CN114079496A

CN114079496A - Space-time gridding satellite-borne data interaction method and device thereof

Info

Publication number: CN114079496A
Application number: CN202010832282.7A
Authority: CN
Inventors: 童晓冲; 朱荣臻; 郭从洲; 张琴芳; 李贺; 吴翔宇; 陈向勇; 王大力
Original assignee: Xi'an Aikesa Technology Co ltd; Information Engineering University of PLA Strategic Support Force
Current assignee: Xi'an Aikesa Technology Co ltd; Information Engineering University of PLA Strategic Support Force
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2022-02-22

Abstract

The invention discloses a space-time gridding satellite-borne data interaction method and a device thereof, which are applied to a first data end and a second data end which are communicated with each other, wherein space-time gridding data is stored in the second data end, and the method for carrying out the satellite-borne data interaction at the first data end comprises the following steps: sending a grid data request frame to the second data terminal; and receiving a grid data response frame sent by the second data end, and analyzing the space-time grid data from the grid data response frame. The space-time gridding satellite-borne data interaction method provided by the invention is suitable for interaction processing of a plurality of satellites, and the space-time gridding data in the interaction process is pre-stored on the satellites and the like, and by utilizing the computing power and the storage resources of a satellite-borne storage system, data migration generated by ground computing can be greatly reduced, the computing path is shortened, the processing process of remote sensing data is accelerated, and thus the real-time requirement of the remote sensing data on ground observation is met.

Description

Space-time gridding satellite-borne data interaction method and device thereof

Technical Field

The invention belongs to the technical field of computer data storage, and particularly relates to a space-time gridding satellite-borne data interaction method and a space-time gridding satellite-borne data interaction device.

Background

After more than 60 years of development, global earth observation systems and global earth observation capabilities are complete, a multi-means multi-platform stereo observation system is formed, and in recent years, microsatellites are in a rapid development stage.

The satellite resources are many in the world, but the ground cannot quickly respond to the high-frequency data request of the user, the reasons are many and complicated, and the deep technical bottleneck is embodied in the following two aspects: (1) the description model and the description specification are different, and the resources are scattered. The satellite observation ground coverage capability generally adopts a description mode of 'track of points under the satellite + width buffer region + time point string' or 'Path + Row + time point string', the description model is complex, the description specification of each satellite is not uniform, and the description specification of different sensors of the same satellite is not uniform; the observation task plans of each satellite are respectively and mutually cooperated, the observation potential of the satellite is not fully exerted, and the resource waste is caused; (2) the satellite data is received by the ground station in a communication transmission mode, and is stored and provided for users in a product mode through a series of processes such as data preprocessing, product processing and the like.

However, at present, the processing of earth observation satellite data is carried out in an earth mode, the satellite data is received by an earth station in a fixed point mode through a communication transmission mode, and is stored and provided for users in a product mode through a series of processes such as data preprocessing, product processing and the like, and the earth processing storage mode is suitable for normalized business processing of single satellite data, but is not worrying about the task requirements of high timeliness and high dynamics.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a space-time gridding satellite-borne data interaction method and a space-time gridding satellite-borne data interaction device.

The embodiment of the invention provides a space-time gridding satellite-borne data interaction method, which is applied to a first data end and a second data end which are communicated with each other, wherein space-time gridding data is stored in the second data end, and the method for carrying out satellite-borne data interaction on the first data end comprises the following steps:

sending a grid data request frame to the second data terminal;

and receiving a grid data response frame sent by the second data end, and analyzing the space-time grid data from the grid data response frame.

In an embodiment of the present invention, before receiving the mesh data response frame sent by the second data end, the method further includes:

receiving a mesh data state frame sent by the second data terminal;

and judging the state information in the grid data state frame, if the state information is in a first state, sending a grid data state response frame to the second data end, and if the state information is in a second state, not operating.

In one embodiment of the present invention, the mesh data request frame includes spatial mesh coding and temporal coding.

In one embodiment of the present invention, the spatiotemporal gridding data is stored in the second data terminal, including:

and obtaining the space-time gridding data by adopting the space grid coding and the time coding and storing the space-time gridding data in the second data terminal.

The embodiment of the invention provides another space-time gridding satellite-borne data interaction method which is applied to a first data end and a second data end which are communicated with each other, space-time gridding data is stored in the second data end, and the space-time gridding satellite-borne data interaction method performed at the second data end comprises the following steps:

receiving a mesh data request frame transmitted by the first data terminal, the mesh data request frame including spatial mesh coding and temporal coding;

and sending a grid data response frame to the first data end, wherein the grid data response frame comprises space-time grid data.

In an embodiment of the present invention, sending a mesh data response frame before the first data end further includes:

judging whether the space-time gridding data has space grid coding and time coding matched with the grid data request frame, if so, setting the state information in the grid data state frame to be in a first state, and if not, setting the state information in the grid data state frame to be in a second state;

sending the grid data state frame to the first data end;

and receiving a mesh data state response frame sent by the first data terminal.

The embodiment of the invention provides a space-time gridding satellite-borne data interaction device, which comprises:

a first data sending module, configured to send the mesh data request frame to the second data end;

and the first data receiving module is used for receiving the grid data response frame sent by the second data terminal and analyzing the space-time grid data from the grid data response frame.

In one embodiment of the invention, the apparatus further comprises:

a second data receiving module, configured to receive the mesh data status frame sent by the second data end;

and the first data processing module is used for judging the state information in the grid data state frame, sending the grid data state response frame to the second data end if the state information is in the first state, and not operating if the state information is in the second state.

The embodiment of the invention provides another space-time gridding satellite-borne data interaction device, which comprises:

a third data receiving module, configured to receive the mesh data request frame sent by the first data end, where the mesh data request frame includes the spatial mesh code and the temporal code;

a second data sending module, configured to send the mesh data response frame to the first data end, where the mesh data response frame includes the spatio-temporal meshing data.

In one embodiment of the invention, the apparatus further comprises:

a second data processing module, configured to determine whether the space-time gridding data has the space grid code and the time code that match the grid data request frame, if yes, set a state information field in the grid data state frame to the first state, and if not, set a state information field in the grid data state frame to the second state;

a third data sending module, configured to send the mesh data status frame to the first data end;

a fourth data receiving module, configured to receive the mesh data status response frame sent by the first data end.

Compared with the prior art, the invention has the beneficial effects that:

the space-time gridding satellite-borne data interaction method provided by the invention is suitable for interaction processing of a plurality of satellites, and the space-time gridding data in the interaction process is pre-stored on the satellites and the like, and by utilizing the computing power and the storage resources of a satellite-borne storage system, data migration generated by ground computing can be greatly reduced, the computing path is shortened, the processing process of remote sensing data is accelerated, and thus the real-time requirement of the remote sensing data on ground observation is met.

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Drawings

FIG. 1 is a schematic flow chart of a spatio-temporal gridding spaceborne data interaction method according to an embodiment of the present invention;

FIG. 2 is a schematic flow chart of another spatio-temporal gridding spaceborne data interaction method according to an embodiment of the present invention;

FIG. 3 is a schematic flow chart of another spatio-temporal gridding spaceborne data interaction method according to an embodiment of the present invention;

FIG. 4 is a schematic flow chart of another spatio-temporal gridding spaceborne data interaction method according to an embodiment of the present invention;

FIG. 5 is a schematic flow chart of a space-time gridding spaceborne data storage method according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a multi-scale trellis encoding method in a spatio-temporal gridding spaceborne data storage method according to an embodiment of the present invention;

FIG. 7 is a schematic diagram illustrating a corresponding relationship between data and grids in a spatiotemporal gridding spaceborne data storage method according to an embodiment of the present invention;

FIG. 8 is a schematic diagram illustrating a spatial relationship between grids and a coverage area of remote sensing data in a spatiotemporal gridding spaceborne data storage method according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a time code conversion method in a space-time gridding satellite-borne data storage method according to an embodiment of the present invention;

FIG. 10 is a schematic diagram illustrating a redundant storage method in a space-time gridding satellite-borne data storage method according to an embodiment of the present invention;

FIG. 11 is a schematic flow chart of constructing a grid index table GCIT in the space-time grid satellite-borne data storage method according to the embodiment of the present invention;

FIG. 12 is a schematic diagram illustrating a mapping relationship between remote sensing data and trellis codes and an on-satellite storage space in the space-time gridding spaceborne data storage method according to the embodiment of the present invention;

FIG. 13 is a schematic diagram illustrating a process of signal synchronization between remote sensing data and auxiliary data according to an embodiment of the present invention;

FIGS. 14a to 14c are schematic diagrams of spatio-temporal gridding spaceborne data interaction under three scenarios provided by the embodiment of the present invention;

15 a-15 c are schematic diagrams of spatio-temporal gridding spaceborne data interaction under three different scenarios provided by the embodiment of the invention;

FIG. 16 is a schematic diagram illustrating search of spatio-temporal gridding data in a spatio-temporal gridding spaceborne data interaction method according to an embodiment of the present invention;

FIG. 17 is a schematic diagram illustrating a spatial grid data search in another spatio-temporal gridding spaceborne data interaction method according to an embodiment of the present invention;

FIG. 18 is a schematic structural diagram of a space-time gridding spaceborne data interaction device according to an embodiment of the present invention;

FIG. 19 is a schematic structural diagram of another spatio-temporal gridding spaceborne data interaction device provided by the embodiment of the invention;

FIG. 20 is a schematic structural diagram of a space-time gridding satellite-borne data interaction device according to another embodiment of the present invention;

FIG. 21 is a schematic structural diagram of another spatio-temporal gridding spaceborne data interaction device according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.

Example one

Referring to fig. 1, fig. 1 is a schematic flow chart of a spatio-temporal gridding spaceborne data interaction method according to an embodiment of the present invention. The embodiment of the invention provides a space-time gridding satellite-borne data interaction method which is applied to a first data end and a second data end which are communicated with each other, space-time gridding data is stored in the second data end, and the space-time gridding data interaction method at the first data end comprises the following steps:

step 1, sending a grid data request frame to a second data end;

and 2, receiving the grid data response frame sent by the second data terminal, and analyzing the space-time grid data from the grid data response frame.

Specifically, the traditional satellite-borne data interaction needs to collect the acquired remote sensing data on the ground, realize the storage of the remote sensing data on the ground, and realize the interaction with the satellite and the like on the ground. Based on the existing problems, the embodiment provides a space-time gridding satellite-borne data interaction method, a first data end and a second data end are subjected to grid division, space grid coding processing and remote sensing data time coding processing in advance, and remote sensing data are stored in space-time gridding data of the second data end in an index mode of space grid coding and time coding. Wherein, first data end includes ground, unmanned aerial vehicle, satellite etc. and the second data end includes data acquisition end such as satellite, unmanned aerial vehicle, camera, for example between unmanned aerial vehicle and ground, satellite and ground, camera and ground, satellite and satellite, satellite and unmanned aerial vehicle, unmanned aerial vehicle and unmanned aerial vehicle etc. all can carry out space-time grid spaceborne data interaction. Specifically, in this embodiment, the first data end sends a grid data request frame to the second data end, and after the second data end receives the grid data request frame, the remote sensing data requested by the grid data request frame is composed into a grid data response frame and sent back to the first data end, and the first data end analyzes the remote sensing data from the grid data response frame and performs corresponding processing on the remote sensing data.

The space-time gridding satellite-borne data interaction method provided by the embodiment is suitable for interaction processing of a plurality of satellites, and the space-time gridding data in the interaction process is pre-stored on the satellites, and by utilizing the computing power and the storage resources of a satellite-borne storage system, data movement generated by ground computing can be greatly reduced, the computing path is shortened, the processing process of remote sensing data is accelerated, and therefore the real-time requirement of the remote sensing data on ground observation is met.

Further, in step 1 of this embodiment, the first data end sends the mesh data request frame to the second data end.

Specifically, the traditional remote sensing data storage is formed by files, space-time gridding data is formed by adopting a space grid coding and time coding mode and is stored in the second data terminal, and interaction is performed on the space-time gridding data in the interaction process. Specifically, the first data end sends a mesh data request frame to the second data end, wherein the structure of the mesh data request frame is specifically shown in table 1.

Table 1 mesh data request frame structure

Frame type

Command word

Spatial trellis coding

Time coding

Check word

It should be noted that the structure of the grid data request frame in this embodiment is not limited to that shown in table 1, and specifically depends on the structure of the grid data request frame in the actual data interaction process, and the data request frame only needs to include the spatial grid coding field and the temporal grid coding field.

Further, in this embodiment, the first data end receives the mesh data response frame sent by the second data end, and analyzes the spatio-temporal meshing data from the mesh data response frame.

Specifically, the structure of the mesh data response frame sent by the second data end in this embodiment is specifically shown in table 2, where the mesh data response frame includes a remote sensing data field, and the remote sensing data is space-time mesh data analyzed from the mesh data response frame.

Table 2 mesh data response frame structure

Frame type

Command word

Remote sensing data

Frame number

Check word

It should be noted that the structure of the mesh data response frame in this embodiment is not limited to that shown in table 2, and is specifically determined according to the structure of the mesh data response frame in the actual data interaction process.

Further, before receiving the mesh data response frame sent by the second data end, the space-time meshed satellite-borne data interaction method of this embodiment further includes:

referring to fig. 2, fig. 2 is a schematic flow chart of another spatio-temporal gridding spaceborne data interaction method according to an embodiment of the present invention. The first data end receives the grid data state frame sent by the second data end.

Specifically, in order to ensure the safety and effectiveness of data processing, in this embodiment, first, at the second data end, it is determined whether remote sensing data corresponding to the grid data request frame exists in the space-time grid data according to the grid data request frame, and the determination result is stored in the status field of the grid data status frame, and the grid data status frame is sent to the first data end. The structure of the mesh data status frame is specifically shown in table 3.

TABLE 3 mesh data State frame Structure

Frame type

Command word

Status word

Check word

It should be noted that the structure of the mesh data state frame in this embodiment is not limited to that shown in table 3, and is specifically determined according to the structure of the mesh data state frame in the actual data interaction process.

Further, in this embodiment, after the first data end receives the mesh data status frame, the status information in the mesh data status frame is determined, and if the status information is in the first state, the mesh data status response frame is sent to the second data end, and if the status information is in the second state, no operation is performed.

Specifically, in this embodiment, the first data end determines whether the first data end requires the second data end to send the mesh data response frame by determining the status field in the mesh data status frame in table 4, specifically, when the status information of the status field in the mesh data status frame is in the first status, the first data end sends the mesh data status response frame to the second data end, which indicates that the first data end and the second data end are in the process of continuing the subsequent data interaction, and when the status information of the status field in the mesh data status frame is in the second status, the first data end does not operate, which indicates that the first data end and the second data end are in the process of not requiring the subsequent data interaction. The mesh data status response frame structure is specifically shown in table 4.

Table 4 mesh data status response frame structure

Frame type

Command word

Check word

It should be noted that the structure of the grid data status response frame in this embodiment is not limited to that shown in table 4, and is specifically determined according to the structure of the grid data status response frame in the actual data interaction process.

The embodiment shifts the ground gridding processing calculation requirement of the remote sensing data to a satellite end, completes the space-time grid storage of the remote sensing data at a data acquisition end by utilizing abundant calculation and storage resources of storage systems such as satellites and the like, and realizes the interaction between the data ends by utilizing space grid coding and time coding as a uniform form of data interaction.

Example two

On the basis of the first embodiment, please refer to fig. 3, where fig. 3 is a schematic flow diagram of another spatio-temporal gridding spaceborne data interaction method provided by the embodiment of the present invention, an embodiment of the present invention provides a spatio-temporal gridding spaceborne data interaction method, which is applied to a first data end and a second data end that communicate with each other, where spatio-temporal gridding data is stored in the second data end, and when the second data end performs the spaceborne data interaction method, the method includes the following steps:

step 1, receiving a grid data request frame sent by a first data end, wherein the grid data request frame comprises space grid codes and time codes;

and step 2, sending a grid data response frame to the first data end, wherein the grid data response frame comprises space-time grid data.

Specifically, the above embodiment is a specific interaction process of the first data end when the first data end and the second data end interact with each other, and the embodiment is a specific interaction process of the second data end when the first data end and the second data end interact with each other. Specifically, the second data end receives a grid data request frame sent by the first data end, the structure of the specific grid data request frame is shown in table 1 in embodiment one, corresponding remote sensing data is searched from space-time gridding data stored in the second data end according to a space grid coding field and a time coding field in the grid data request frame, the remote sensing data is encapsulated in a grid data response frame and sent to the first data end, and the structure of the specific grid data response frame is shown in table 2 in embodiment one.

It should be noted that the grid data request frame in this embodiment is not limited to the structure shown in table 1 in the first embodiment, and the structure of the grid data response frame is not limited to the structure shown in table 2 in the first embodiment, and is specifically determined according to the structures of the grid data request frame and the grid data response frame in the actual data interaction process.

Further, in the space-time gridding satellite-borne data interaction method of the embodiment, before sending the grid data response frame to the first data end, the method further includes:

referring to fig. 4, fig. 4 is a schematic flow chart of another spatio-temporal gridding spaceborne data interaction method according to an embodiment of the present invention. And if the space-time gridding data exists, setting the state information in the grid data state frame to be in a first state, and if the space-time gridding data does not exist, setting the state information in the grid data state frame to be in a second state.

Specifically, in this embodiment, after receiving the grid data request data, the second data end determines whether the space-time grid data stored in the second data end has the space grid coding field and the time coding field matched with the grid data request frame, if the space grid coding field and the time coding field matched with the grid data request frame exist, it indicates that the data requested by the first data end exists in the space-time grid data, the state information field in the grid data state frame is set to the first state, and if the space grid coding field and the time coding field matched with the grid data request frame do not exist, it indicates that the data requested by the first data end does not exist in the space-time grid data, the state information field in the grid data state frame is set to the second state, so that the security of data processing is ensured through the grid data state frame, Effectiveness. The structure of the specific mesh data status frame is shown in table 3 in the first embodiment.

Further, the second data end sends the mesh data state frame to the first data end.

Specifically, the present embodiment transmits the mesh data status frame updated according to the mesh data request frame to the first data end.

Further, the second data end receives the mesh data state response frame sent by the first data end.

Specifically, in this embodiment, the first data end determines whether the first data end needs to receive the mesh data response frame of the second data end through the status information field in the mesh data status response frame, so as to reduce unnecessary interaction times between the first data end and the second data end. The structure of the specific mesh data status response frame is shown in table 4 in the first embodiment.

It should be noted that the mesh data status frame in this embodiment is not limited to the structure shown in table 3 in the first embodiment, and the structure of the mesh data status response frame is not limited to the structure shown in table 4 in the first embodiment, and is specifically determined according to the structures of the mesh data status frame and the mesh status data response frame in the actual data interaction process.

EXAMPLE III

On the basis of the first and second embodiments, in the satellite-borne data interaction process, the space-time gridding data is stored in the second data end, specifically, please refer to fig. 5, where fig. 5 is a flowchart of a space-time gridding satellite-borne data storage method provided by an embodiment of the present invention, and a process of obtaining the space-time gridding data by using space grid coding and time coding and storing the space-time gridding data in the second data end includes the following steps:

step 1, preprocessing the remote sensing data according to the auxiliary data to obtain space-time data of the remote sensing data, wherein the space-time data comprises time data and space data.

Specifically, the present embodiment needs to acquire auxiliary data when performing space-time gridding data storage, and specifically the auxiliary data includes attitude, orbit, time, and the like of the satellite. It should be noted that the auxiliary data is different for different scenes, and is specifically determined according to the actual situation of the scene.

In this embodiment, the remote sensing data is preprocessed to obtain a region range coordinate covered by the remote sensing data, specifically, according to auxiliary data such as an orbit, an attitude, and time of a satellite, in combination with a light path design of a sensor in an optical imaging subsystem, positioning processing of the remote sensing data is completed, and space information such as a coordinate position of the remote sensing data is formed, specifically, step 1 includes obtaining boundary range information of the remote sensing data and range information of a preset pixel point set, calculating the boundary range information of the remote sensing data according to the auxiliary data to obtain first position information, calculating the range information of the preset pixel point set according to the auxiliary data to obtain second position information, and obtaining the space data of the remote sensing data according to the first position information and the second position information:

in the positioning of the data space of the remote sensing satellite, a coordinate system and the conversion thereof are the basis of a space positioning algorithm, the whole positioning process mainly comprises matrix calculation and floating point operation, and basically has no circular calculation. However, due to different breadth of the remote sensing data, for the remote sensing data with a large part breadth, the internal data deformation is large, calculation is performed only according to the boundary of the data coverage range, and a large positioning error is caused by adopting a uniform interpolation method, so in the embodiment, the first position information is obtained by calculating the boundary range information of the remote sensing data, and meanwhile, the second position information is obtained by calculating the range information of some regularly arranged pixel point sets in the remote sensing data, namely, the second position information is obtained by calculating the range information of a preset pixel point set in the remote sensing data, and the spatial data of the remote sensing data is positioned by the first position information and the second position information together, so that more accurate position reference can be provided for spatial gridding of subsequent remote sensing data.

In the remote sensing satellite data time data positioning, a time system and conversion thereof are the basis of a time positioning algorithm, and time data of remote sensing data is obtained by combining time information in auxiliary data.

The embodiment adopts a mode of storing the remote sensing data by the space-time data, thereby strengthening the correlation of the space-time of the remote sensing data and the comprehensive application of a plurality of satellite source data.

And 2, carrying out first coding processing on the spatial data of the remote sensing data to obtain a first spatial grid code.

Specifically, in this embodiment, first, encoding is performed on spatial data of remote sensing data, and specifically, step 2 includes step 2.1, step 2.2, and step 2.3:

and 2.1, performing meshing division on the earth space according to a preset meshing division mode to obtain a plurality of meshes.

Specifically, in the spatial grid coding of this embodiment, a latitude and longitude space of the earth is first divided according to a preset grid division manner to obtain a plurality of grids. The preset mesh generation mode comprises a preset mesh generation level, and preferably the preset mesh generation level is 32. In the encoding process of the spatial grids, the spatial grids of different levels are expressed by adopting codes with different lengths, the longer the codes are, the smaller the grids are, the shorter the codes are, the larger the grids are, and the lengths of the codes are, the levels of the spatial grids are expressed. The number of grids corresponding to the longitude direction and the latitude direction of the earth is the same.

In the embodiment, the preset mesh generation mode is an earth surface space mesh and a coding standard JB8896-2017, and can also be other types of earth mesh systems.

And 2.2, carrying out first coding processing on the plurality of grids according to a preset spatial grid coding mode to obtain a second spatial grid code corresponding to each grid.

Specifically, in the process of storing and processing hardware on the remote sensing satellite, the embodiment considers that the hardware processing often adopts the characteristic of fixed-length data, particularly for the remote sensing data, remote sensing data with different resolutions and different coverage ranges are very common, and grids with different scales are required to be used for dealing with on-satellite organization and storage of the remote sensing data, so that the length of the variable-length multi-scale grid code needs to be fixed.

The encoding method using fixed-length integer encoding to represent multi-scale information is called multi-scale integer encoding, i.e. a preset spatial trellis encoding method. The multi-scale integer coding is established on the basis of single-scale integer coding, such as binary one-dimensional coding in GJB8896-2017, the single-scale integer coding is obtained by performing Morton crossing by adopting row-column coding, and the coding value of the single-scale integer coding is shifted to the left by one bit, so that the coding value of the maximum level (31 st level) in the multi-scale integer coding can be obtained. If the X, Y coordinates of the grid are 32 bits each and then converted into a single-scale integer code value, the value cannot be shifted left by one bit to obtain a multi-scale integer code value, so that in the single-scale integer code method, the X, Y coordinates of the grid are 31 bits each, and the purpose is to reserve 2 bits to record scale information.

Referring to fig. 6, fig. 6 is a schematic diagram of a multi-scale trellis encoding method in a space-time gridding satellite-borne data storage method according to an embodiment of the present invention. It can be seen that, in this embodiment, all the integer code values in the 31 th level are even numbers, the code values of other levels are generated based on this level, and the average of every adjacent 4 integer code values in the 31 th level is taken to obtain the integer code value of the 30 th level, which is an odd number, and so on, as shown in fig. 6, so that the integer code values of 31 levels in total can be obtained, and an inverted quadtree is formed.

According to the characteristics of the multi-scale grid integer code and the characteristics of the earth space, the earth grid can be divided as follows: firstly, expanding a latitude space to enable the spatial range of the latitude space to be consistent with that of a longitude space, and obtaining an expanded longitude and latitude space; secondly, dividing the expanded longitude and latitude space into hierarchical grids which are divided in a preset grid division mode according to the inverted quadtree mode to obtain a plurality of grids; and determining the origin of coordinates of each grid, and performing multi-scale integer coding on the origin of coordinates corresponding to each grid to obtain second space grid codes respectively corresponding to each grid.

It should be noted that, in the first and second embodiments, the spatial trellis codes in the grid data request frame of the first data end are obtained by the above method, so as to ensure consistency with the spatial trellis codes of the space-time grid data stored in the second data end.

And 2.3, acquiring a first spatial grid code corresponding to the spatial data of the remote sensing data from the second spatial grid code.

Specifically, please refer to fig. 7 and 8, where fig. 7 is a schematic diagram of a corresponding relationship between data and a grid in the space-time gridding satellite-borne data storage method according to the embodiment of the present invention, and fig. 8 is a schematic diagram of a spatial relationship between a grid and a remote sensing data coverage area in the space-time gridding satellite-borne data storage method according to the embodiment of the present invention. The embodiment associates the remote sensing data by using a small number of grids closest to the remote sensing data range and the second spatial grid code thereof, so that the storage work of the remote sensing data becomes storage according to the second spatial grid code. Since the multi-source remote sensing data (different types and different levels) have different scales, positions and coverage areas, and the earth division grids are rigid multi-scale (fixed multi-scale) grid frames, the two remote sensing data can not completely correspond to each other, for example, the remote sensing data represented by a to F in fig. 7 correspond to the earth division grids of each level respectively. The spatial relationship between the multi-scale earth-generated mesh and the remote sensing data coverage area is shown in fig. 8, and it can be seen from fig. 8 that the remote sensing data coverage area 70 is contained by the earth-generated mesh 71 at the lowest level, the remote sensing data coverage area 70 contains the earth-generated mesh a, the remote sensing data coverage area 70 intersects with the earth-generated mesh b, and the remote sensing data coverage area 70 is separated from the earth-generated mesh c, and it can be seen that the spatial relationship between the earth-generated mesh and the remote sensing data coverage area can include the following four types: the earth subdivision grids comprise remote sensing data, the earth subdivision grids comprise the remote sensing data, the earth subdivision grids are intersected with the remote sensing data, and the earth subdivision grids are separated from the remote sensing data, which are respectively referred to as including, included, intersected and separated. According to the analysis, the spatial relationship between the earth subdivision grid and the coverage area of the remote sensing data is judged step by step from top to bottom to realize the gridding association of the remote sensing data, namely the association between the remote sensing data and the second spatial grid code, and the association coding result of the remote sensing data needs to meet the following three limiting conditions: and through the three limiting conditions, a user can adjust the gridding correlation result according to the specific condition of the remote sensing data to obtain an optimal result, namely, the correlation result of the remote sensing data and the second space grid code is found and recorded as the first space grid code.

And 3, carrying out second coding processing on the time data of the remote sensing data to obtain a time code.

Specifically, in order to unify and standardize the time format of the remote sensing data and improve the storage efficiency, the second encoding processing is performed on the time data of the remote sensing data according to the preset time grid encoding mode to obtain the time code. Currently, in the storage process of remote sensing data, time information is generally stored in the form of a timestamp and a character string, and the form is various. The embodiment converts the time information of the remote sensing data in various forms into multi-scale time codes (the code level is 63 rd level, and the time information of the remote sensing data is expressed accurately enough). The conversion process of the time information in this embodiment specifically includes: decomposing the timestamp/character string Time into integer counts of common Time scales, namely year (A), month (B), day (C), Time (D), minute (E), second (F), millisecond (G) and microsecond (H), converting A into 17-bit binary numbers, converting B into 4-bit binary numbers, converting C and D into 5-bit binary numbers, converting E and F into 6-bit binary numbers, converting G and H into 10-bit binary numbers, filling high bits of each binary number with 0, connecting the binary numbers corresponding to A-H on a bit domain, obtaining a single-scale Time code corresponding to the Time, moving the single-scale Time code value to the left by one bit, obtaining 63-level multi-scale Time code, wherein the multi-scale Time code is the final Time code of the embodiment.

Referring to fig. 9, fig. 9 is a schematic diagram of a time code conversion method in the space-time gridding spaceborne data storage method according to the embodiment of the present invention, for example, time information of remote sensing data is: year (A): 2018. month (B):10, day (C):1, hour (D): 13. minute (E) 30, second (F) 29, millisecond (G): 300. microsecond (H) 0; the time information is subjected to binary conversion according to the rule to obtain: year (A): 00000011111100010, month (B) 1010, day (C) 0001, hour (D): 01101. 011110 in minutes (E), 011101 in seconds (F), and milliseconds (G): 0100101100, microsecond (H) 0000000000; after the binary code values are spliced, the single-scale time coding value corresponding to the time information of the obtained remote sensing data is as follows: 71024248425328640, respectively; and shifting the obtained single-scale time coding value by one bit to the left to obtain a 63 rd level multi-scale time coding value: 142048496850657280, the time code of the remote sensing data is: 142048496850657280.

it should be noted that, in both the first and second embodiments, the time code in the grid data request frame of the first data end is obtained by the above method, so as to ensure consistency with the time code of the space-time grid data stored in the second data end.

And 4, performing index processing on the remote sensing data according to the first space grid code and the time code to obtain space-time gridded remote sensing data.

Specifically, the traditional single data index table mode is abandoned, the data index table is combined with the grid coding index table to establish the on-satellite storage of the remote sensing data, and the specific step 4 includes the steps of 4.1, 4.2 and 4.3:

and 4.1, constructing a data index table of the remote sensing data according to the first space grid code and the time code.

Specifically, a Data Index Table (Data Index Table, simply referred to as DIT) in this embodiment is used for indexing the remote sensing Data, and the Data Index Table includes an identifier ImageID of the remote sensing Data, a time code TimeCode of the remote sensing Data, a first spatial mesh code set GridCodeSet associated with the remote sensing Data, and a physical storage space ImageAddress of the remote sensing Data, specifically:

identity ImageID of the remote sensing data: the data type is an integer, is used as a main key of a data index table DIT, is set to be self-increment and is used for marking the remote sensing data, and the aim is to uniformly mark the remote sensing data and improve the storage efficiency of the remote sensing data mark;

time code of remote sensing data: the data type is a 64-bit unsigned integer, and is used for recording the acquisition time of the remote sensing data and establishing a time index, so that the time format is unified and the storage efficiency is improved;

the correlation first space grid coding set GridCodeSet of the remote sensing data is as follows: the data type is a 64-bit unsigned integer array and is used for recording a related first space grid coding set corresponding to the remote sensing data;

physical storage space ImageAddress of the remote sensing data: an address representing a physical storage space of the remotely sensed data.

It should be noted that, in practical application, other related fields may also be added to the fields in the data index table DIT as needed, and the embodiment adds the ImageAddress field of the physical storage space of the remote sensing data.

And 4.2, constructing a grid coding index table of the remote sensing data according to the second spatial grid coding.

Specifically, in the embodiment, a Grid Code Index Table (GCIT for short) of the remote sensing data is established and used for spatial Grid indexing of the remote sensing data, so as to convert a two-dimensional remote sensing data spatial Index into a one-dimensional Grid Code Index, which indicates that a one-dimensional Code Index Table is formed by second spatial Grid codes, thereby improving the construction of the remote sensing data Index and realizing rapid remote sensing data storage. The grid code index table comprises a second spatial grid code CodeIndex, an identification set ImageIDSet of the remote sensing data and a logical mapping set NodeCoordSet of the remote sensing data, and specifically comprises the following steps:

second spatial trellis coding CodeIndex: the earth subdivision grid code is a main key of a grid index table GCIT and can establish a one-dimensional grid code index, and the earth subdivision grid code is a code value corresponding to each grid obtained by subdividing the longitude and latitude space of the earth;

identity set ImageIDSet of remote sensing data: the field is stored in a binary form, so that the splicing and splitting of the identification ImageID of the remote sensing data have high efficiency to ensure the storage efficiency;

the logic mapping set of the remote sensing data NodeCoordSet: the grid nodes correspond to a logical mapping set of pixel point coordinates of the remote sensing data, the logical mapping set of the pixel point coordinates of the remote sensing data corresponds to four corner points of a grid of the second spatial grid code CodeIndex, the pixel point coordinates of each piece of remote sensing data in the identification set ImageIDSet of the remote sensing data are positive when the remote sensing data are inside and negative when the remote sensing data are outside, each piece of remote sensing image is stored by 128 bits (16 bits multiplied by 2 multiplied by 4), and the field is stored in a binary form, so that the splicing and splitting of the logical mapping set NodeCoordSet of the remote sensing data have high efficiency, and the storage efficiency is ensured.

In practical situations, because the geometric accuracy of the remote sensing data is not sufficient, and seamless connection between the remote sensing data and the space grid framework may be impossible, please refer to fig. 10, where fig. 10 is a schematic diagram of a redundant storage method in a space-time grid spaceborne data storage method provided by an embodiment of the present invention, the embodiment uses the redundant storage method, that is, the storage content in the space grid includes: deterministic data and redundant part data (an uncertain part of data precision), when grid corner points correspond to pixel point coordinates of the remote sensing data, the upper grid corner point, the lower grid corner point, the left grid corner point, the right grid corner point, the upper grid corner point, the right grid corner point, the left grid corner point, the right grid corner point, the left grid corner point and the right grid corner point respectively extend delta on the basis of the pixel coordinates, the geometric positioning precision (data redundancy) of the remote sensing data is guaranteed that the remote sensing data cannot be omitted.

It should be noted that, in practical application, other related fields may be added to the field in the grid index table GCIT according to needs, and in this embodiment, a field of a logical mapping set nodecordset of remote sensing data is added.

And 4.3, carrying out index processing on the remote sensing data according to the data index table and the grid coding index table to obtain the space-time gridding remote sensing data.

Specifically, in this embodiment, first, the first spatial grid code and the time code of the remote sensing data are obtained through the above step 2 and step 3, and then, the index management is performed on the remote sensing data by constructing the data index table and the grid code index table through the step 4.1 and step 4.2. Referring to fig. 11, fig. 11 is a schematic flow chart of constructing a grid index table GCIT in the space-time grid satellite-borne data storage method according to the embodiment of the present invention, where the specifically constructing of the grid index table GCIT includes: determining a limiting condition of each piece of remote sensing data in gridding correlation according to a data index table DIT, calculating a second space grid code GirdeCodeSet corresponding to the remote sensing data in the data index table DIT one by one, then inserting the remote sensing data into a grid code index table GCIT according to the second space grid code GirdeCodeSet, sequencing second space grid code CodeIndex fields in the grid code index table GCIT, establishing a one-dimensional grid code index of the remote sensing data, and obtaining space-time gridding remote sensing data, wherein the space-time gridding remote sensing data represents the remote sensing data related to a specific first space grid code grid and a specific time period.

After the creation of the grid coding index table GCIT is completed, the grid coding index table GCIT can be updated, specifically, whether the grid coding index table GCIT is updated or not depends on whether the remote sensing data in the data index table DIT is changed or not. When remote sensing data are inserted into the data index table DIT, if the quantity of the inserted remote sensing data is large, the grid coding index table GCIT is reconstructed once, otherwise, new remote sensing data are inserted into the grid coding index table GCIT according to the method for constructing the grid coding index table GCIT; when the data index table DIT deletes data, if the deleted remote sensing data amount is large, the grid coding index table GCIT is reconstructed once, otherwise, according to the method for constructing the grid coding index table GCIT, the remote sensing data can be deleted from the grid coding index table GCIT. The reason for adopting the above strategy is that: when large-scale remote sensing data are inserted and deleted, the efficiency is lower than that of reconstructing a grid coding index table GCIT.

In the embodiment, all the earth observation data are organized and stored according to a space-time grid mode, and all the earth observation data are related to a specific grid and a specific time period through the data index table and the grid coding index table, so that the rapid storage processing and application of the remote sensing data are realized by utilizing the rule consistency, the identification uniqueness, the coding integrity and the scale diversity of the global grid.

And 5, performing on-satellite mapping storage processing on the space-time gridding remote sensing data to realize storage of the remote sensing data on the satellite.

Specifically, please refer to fig. 12, and fig. 12 is a schematic diagram of a mapping relationship between remote sensing data and trellis codes and an on-satellite storage space in a space-time gridding satellite-borne data storage method according to an embodiment of the present invention. In this embodiment, the space-time gridding remote sensing data corresponding to the remote sensing data and the first spatial grid code and the time code is obtained according to the step 4. And for the space-time gridding remote sensing data, a 'cluster' is adopted as a unit to manage the whole storage space on the satellite, and the distribution of the 'cluster' is not a fixed distribution mode in advance, but is dynamically distributed and recovered according to needs. The grid range covered by the remote sensing data can obtain a corresponding first spatial grid code set, and the remote sensing data for different first spatial grid codes can be mapped into a series of different 'cluster' units, so as to establish the association between the first spatial grid code and the storage space on the satellite, such as a first spatial grid code 1, the 'cluster' unit corresponding to the first spatial grid code on the satellite comprises a storage space cluster 0, a storage space cluster 1, … … and a storage space cluster l, and a first spatial grid code 2, the 'cluster' unit corresponding to the first spatial grid code on the satellite comprises a storage space cluster l +1, a storage space cluster l +2, … … and a storage space cluster, and so on until the last first spatial grid code comprises a maximum storage space cluster MAX corresponding to the satellite. The method comprises the steps that N is the number of first space grid codes of remote sensing data, N is an integer larger than 0, l, N and m are space storage cluster conditions of different first space grid codes on a satellite respectively, N is larger than m in the embodiment, m is an integer larger than 0, and the size of a dynamic allocation and recovery cluster as required is related to the writing speed of the remote sensing data into a storage space cluster, the size of a storage space buffer area and the organization of a storage unit and is determined according to an actual scene.

Further, in this embodiment, before step 1, the remote sensing data and the auxiliary data are synchronized to obtain synchronized remote sensing data and synchronized auxiliary data.

Specifically, since the grid information calculation depends on satellite assistance data (attitude, orbit, time, etc.), most satellite assistance data and remote sensing data are transmitted to the ground for correlation processing. However, in the present application, grid information processing is performed on a satellite, and after receiving a data acquisition command of a satellite-borne sensor of the satellite on the satellite, a storage system responds to the command according to the following steps to implement synchronization of auxiliary data and remote sensing data of the satellite, please refer to fig. 13, where fig. 13 is a schematic flow diagram of signal synchronization of the remote sensing data and the auxiliary data provided in the embodiment of the present invention, and specifically, the present embodiment takes an application of an optical load of a remote sensing satellite as an example: assuming that the storage board receives the command for starting the camera to record at the time t1, the storage main control board will wait until the next pulse of seconds comes to start the camera, that is, at the time t2 in fig. 13, a delay t' will be generated; after the camera is configured at the time T2, there is a delay T ″ when the camera data arrives at the memory board, that is, the memory board will only see the camera data at the time T3, and the auxiliary information such as the satellite attitude orbit received at the time T2 is stored together with the camera data according to the agreed frame format; the auxiliary data such as satellite attitude orbit and the like obtained by each shooting has a fixed delay t ' with the camera data, but because the imaging time delay of the camera is known, the auxiliary data such as the satellite attitude orbit and the like only has a fixed delay t ' with the camera data, so that the synchronous processing of the fixed delay t ' is used for obtaining the synchronous remote sensing data (the camera data) and the auxiliary data such as the satellite attitude orbit and the like, thereby ensuring that the grid data calculated by the auxiliary data such as the satellite attitude orbit and the like has correlation with the remote sensing data.

In summary, the space-time gridding data generation method provided by this embodiment is suitable for storage processing of multiple satellites, and on one hand, multiple satellites have a consistent storage model, and on the other hand, storage processing can be directly and rapidly performed on the satellites, so that the real-time requirement of remote sensing data on earth observation is met; the embodiment introduces a uniform storage system at the remote sensing data acquisition end, pushes the storage processing of the remote sensing data to the forefront end, enables the calculation to be closer to the source of the data, releases the pressure that the prior remote sensing data needs to be collected on the ground and then processed on the ground data center resources to a certain extent, meanwhile, the data interaction between the heaven and the earth, between the satellite and between the satellites has a uniform interface, breaks through the old chimney type information island situation, forms a remote sensing gridding storage pool independent of users, ensures that the data does not directly serve the users, the method comprises the steps that firstly, gridding organization and storage are carried out, a gridding storage pool is used as a service source facing a user, the service of remote sensing data is virtualized, the user does not care about the source and the type of the data any more, the virtual pool only needs to provide the user with satisfied data service, and the traditional product service mode is completely changed into the data service mode; by fully utilizing the computing power and the storage resources of the satellite-borne storage system, data migration generated by computing can be greatly reduced, the computing path is shortened, and the storage processing process of the remote sensing data is accelerated; according to the hardware module of the space-time gridding coding algebra library, a user can directly customize the application of space-time gridding in a secondary development mode, and based on gridding storage, storage equipment can be directly constructed on a hardware level, an operating system and a database are separated, and technical reserve is provided for forming a customized, light, small, rapid and efficient data warehouse.

Example four

On the basis of the third embodiment, please refer to fig. 14a to c, which are schematic diagrams of spatio-temporal gridding spaceborne data interaction under three scenes provided by the embodiment of the present invention, and fig. 15a to c, which are schematic diagrams of spatio-temporal gridding spaceborne data interaction under another three scenes provided by the embodiment of the present invention, in this embodiment, the spatio-temporal gridding spaceborne data interaction of this embodiment is described with three specific scenes on the basis of the above embodiment:

fig. 14a and 15a show the interaction between the satellite and the terrestrial space-time grid satellite-borne data provided in this embodiment, taking fig. 14a and 15a as an example, it can be seen that, in this embodiment, the terrestrial is a first data end, the satellite is a second data end, the space-time grid data is pre-stored in the satellite (the second data end), and the specific storage process of the space-time grid data on the specific satellite is as described in the third embodiment, the terrestrial surface sends a grid data request frame, the grid data request frame includes a space grid code and a time code, the satellite receives the grid data request frame, analyzes the space grid code and the time code from the grid data request frame, matches the grid data request frame with the space-time grid data to find space-time grid subdata (remote sensing data) matching the space grid code and the time code, and if there is matched space-time grid subdata, sends a grid data state frame to the terrestrial surface, and the ground determines whether a grid data response frame sent by the satellite needs to be received according to the state information in the grid data state frame, if the ground agrees to receive the grid data response frame, the grid data state response frame is sent to the satellite, the satellite sends the grid data response frame to the ground after receiving the grid data state response frame, the ground analyzes space-time grid subdata from the grid data response frame so as to complete one-time space-time grid subdata interaction, and the steps are sequentially carried out to complete the interaction of the whole space-time grid data. The ground space grid coding and time coding adopt a coding mode consistent with the space grid coding and time coding in the satellite space-time grid data storage process, and the specific coding is as described in the embodiment three

steps

2 and 3.

Referring to fig. 16, fig. 16 is a schematic view of searching spatio-temporal gridding data in a spatio-temporal gridding spaceborne data interaction method provided by an embodiment of the present invention, and the finding of spatio-temporal gridding subdata (remote sensing data) matched with a spatial grid code and a temporal code includes:

(1) inputting search parameters: the search area and time range (start, end time) are entered.

(2) And (3) space search: calculating the Result of the space search by using the space search method (as described below) according to the search area input in (1)₁。

(3) Time code conversion: calculating corresponding time code TimeCode by using integer coding method of multi-scale time period according to the input starting time and ending time in step (1)_start、TimeCode_end。

(4) Time code search: if Result is in DIT table of data index table₁(i) Corresponding time code is TimeCode (i), Result₁Meets the condition (TimeCode (i) epsilon [ TimeCode [)_start,TimeCode_end]) The set formed by all the elements is the space-time search result.

(5) Outputting a search result: and (4) outputting the space-time grid data corresponding to the space-time search result in the step (4), namely finding out the space-time grid subdata (remote sensing data) matched with the space grid code and the time code in the embodiment.

The space-time search of the remote sensing data is completed on the basis of a space search method, a corresponding space grid coding range and a corresponding time coding range are calculated according to a user search area and a time range, the remote sensing data subunit information of each grid coded index list in the grid coding range is traversed, and a space-time query result of the remote sensing data is obtained, so that the space-time grid data (remote sensing data) in the interactive process is determined.

Referring to fig. 17, fig. 17 is a schematic view of searching spatial grid data in another space-time gridding spaceborne data interaction method according to an embodiment of the present invention, and it can be known from the third embodiment that the spatial relationship between the multi-scale earth subdivision grid and the coverage area of the remote sensing data includes: the multi-scale earth subdivision grid and the remote sensing data coverage area are not intersected or mutually contained, the multi-scale earth subdivision grid and the remote sensing data coverage area are intersected, the multi-scale earth subdivision grid contains the remote sensing data coverage area, and the remote sensing data coverage area contains the multi-scale earth subdivision grid. Therefore, three relations exist after the multi-scale earth subdivision grid and the remote sensing data coverage area are gridded: the two grids are separated, the multi-scale earth generation grid is a father unit of the remote sensing data coverage area, and the remote sensing data coverage area is a child unit of the multi-scale earth generation grid, so that the embodiment provides a space search method as follows:

(1) input search area (remote sensing data coverage area): and inputting boundary vector coordinate data of a search area, wherein the search area can be any polygon, or inputting coordinate data of a target point, and the type of the coordinate data is longitude and latitude coordinates.

(2) The first gridding of the search area: calculating a first gridding coding result S of the search area by a polygonal area gridding method according to the input coordinate data in the step (1)₁。

(3) The grid index table GCIT looks for the first time: s calculated according to (2)₁Calculating S by using the coding subunit calculation method₁(i) Corresponding sub-interval range, then looking up the coding set O belonging to the sub-interval range in the grid index table GCIT (CodeIndex field)₁(i) (ii) a Repeating the above operations until traversing S₁Obtaining a first search coding set result O of a grid index table GCIT₁。

(4) Search area second gridding (with coding set S)₂): s calculated according to (2)₁Calculating S using a coded parent cell calculation method₁All coded parent units in (at the level of)

Minimum level when the remote sensing data is gridded) coding, and deleting repeated coding, the second gridding coding result S for searching the coverage area of the remote sensing data can be obtained₂。

(5) And (3) searching a grid index table GCIT for the second time: traversing S by the same method as (2)₂Obtaining a code set

Then, the codes are collected by utilizing a child/parent unit calculation method

Satisfies the condition (S)₁At least one of which belongs to a coding set

Sub-unit of) into a code set O₂I.e. the second search result of the grid index table GCIT.

(6) Searching for an identifier ImageID of the remote sensing data: according to a coding set O₁And a coding set O₂And (3) extracting corresponding binary data from the middle coded value (identifier ImageIDSet field of the remote sensing data), then disassembling the binary data into an identifier ImageID set of the remote sensing data (multithreading can be adopted in the process to improve the efficiency), and deleting repeated values to obtain the identifier ImageID set of the remote sensing data which meets the search condition.

(7) Outputting a search result: the identifier ImageID set of the remote sensing data which is output and accords with the search condition is the space search ReSult ReSult₁。

In the gridding index table GCIT of the embodiment, the remote sensing data subunits belonging to the same grid coding unit contain identification ImageID information to which the remote sensing data belongs, all the remote sensing data subunits of all the grid codes are traversed, and then an identification ImageID set belonging to the remote sensing data can be searched, so that the realization is simple.

The gridding index table GCIT is created based on grids, has natural advantages, and can quickly search remote sensing data subunit information of the grid points at different moments according to space grid coding and time coding requested by a user.

Similarly, fig. 14b and fig. 15b show the space-time gridding satellite-borne data interaction between the unmanned aerial vehicle and the ground in this embodiment, it can be seen that, in this embodiment, the ground is a first data end, and the unmanned aerial vehicle is a second data end, specifically, as above, the interaction process between the satellite and the ground is not described repeatedly here.

Similarly, fig. 14c and fig. 15c show the space-time gridding spaceborne data interaction between the unmanned aerial vehicle and the ground provided in this embodiment, and it can be seen that the unmanned aerial vehicle in this embodiment is the first data terminal, and the satellite is the second data terminal, specifically, the above interaction process between the satellite and the ground and between the unmanned aerial vehicle and the ground is not described again here.

The space-time gridding satellite-borne data interaction in the three scenarios provided by this embodiment may be implemented in the first, second, and third embodiments, which have similar implementation principles and technical effects, and are not described herein again.

It should be noted that, the interaction between the satellite and the ground, between the unmanned aerial vehicle and the ground, and between the unmanned aerial vehicle and the satellite is only described as an embodiment, the space-time gridding satellite-borne data interaction in this embodiment is not limited to these three scenarios, and both the above-mentioned interaction process that is one-to-one and the above-mentioned interaction that is one-to-many can be implemented, and any scenario that satisfies the above-mentioned interaction process all belongs to the scope protected by this application.

EXAMPLE five

On the basis of the fourth embodiment, please refer to fig. 18 and 19, fig. 18 is a schematic structural diagram of a spatio-temporal gridding spaceborne data interaction device provided by the embodiment of the present invention, and fig. 19 is a schematic structural diagram of another spatio-temporal gridding spaceborne data interaction device provided by the embodiment of the present invention. The embodiment provides a space-time gridding satellite-borne data interaction device, which comprises:

and the first data sending module is used for sending a grid data request frame to the second data terminal, wherein the grid data request frame comprises spatial grid coding and time coding.

Further, the space-time gridding satellite-borne data interaction device provided by the embodiment further includes:

and the second data receiving module is used for receiving the grid data state frame sent by the second data terminal.

And the first data processing module is used for judging the state information in the grid data state frame, if the state information is in a first state, sending a grid data state response frame to the second data terminal, and if the state information is in a second state, not operating.

The space-time gridding satellite-borne data interaction device provided by the embodiment can execute the first embodiment, the second embodiment, the third embodiment and the fourth embodiment, and the implementation principle and the technical effect are similar, and are not described herein again.

EXAMPLE six

On the basis of the fifth embodiment, please refer to fig. 20 and 21, fig. 20 is a schematic structural diagram of another spatio-temporal gridding spaceborne data interaction device provided by the embodiment of the present invention, and fig. 21 is a schematic structural diagram of another spatio-temporal gridding spaceborne data interaction device provided by the embodiment of the present invention. The embodiment provides a space-time gridding satellite-borne data interaction device, which comprises:

and the third data receiving module is used for receiving the grid data request frame sent by the first data terminal, and the grid data request frame comprises spatial grid coding and time coding.

And the second data sending module is used for sending a grid data response frame to the first data end, wherein the grid data response frame comprises space-time grid data.

and the second data processing module is used for judging whether the space-time gridding data has space grid coding and time coding matched with the grid data request frame, if so, setting the state information field in the grid data state frame to be in a first state, and if not, setting the state information field in the grid data state frame to be in a second state.

And the third data sending module is used for sending the grid data state frame to the first data end.

And the fourth data receiving module is used for receiving the grid data state response frame sent by the first data terminal.

The space-time gridding satellite-borne data interaction device provided by the embodiment can execute the first embodiment, the second embodiment, the third embodiment, the fourth embodiment and the fifth embodiment, and the implementation principle and the technical effect are similar, and are not described herein again.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims

1. A space-time gridding satellite-borne data interaction method is applied to a first data end and a second data end which are communicated with each other, space-time gridding data are stored in the second data end, and the space-time gridding data interaction method performed at the first data end comprises the following steps:

sending a grid data request frame to the second data terminal;

2. The space-time gridding satellite-borne data interaction method according to claim 1, wherein before receiving the grid data response frame transmitted by the second data terminal, the method further comprises:

receiving a mesh data state frame sent by the second data terminal;

3. The space-time gridded on-board data interaction method according to claim 1, wherein the grid data request frame comprises spatial grid coding and temporal coding.

4. The spatio-temporal gridding spaceborne data interaction method according to claim 3, wherein spatio-temporal gridding data is stored in the second data terminal and comprises:

5. A space-time gridding satellite-borne data interaction method is applied to a first data end and a second data end which are communicated with each other, space-time gridding data are stored in the second data end, and the space-time gridding satellite-borne data interaction method performed at the second data end comprises the following steps:

6. The space-time gridding satellite-borne data interaction method according to claim 5, wherein the step of sending a gridding data response frame before the first data end further comprises:

sending the grid data state frame to the first data end;

and receiving a mesh data state response frame sent by the first data terminal.

7. A space-time gridding satellite-borne data interaction device is characterized by comprising:

8. The space-time gridded on-board data interaction device according to claim 7, further comprising:

9. A space-time gridding satellite-borne data interaction device is characterized by comprising:

10. The space-time gridded on-board data interaction device according to claim 9, further comprising: