CN117544214B - Satellite earth data transmission method, device, equipment and readable storage medium - Google Patents

Satellite earth data transmission method, device, equipment and readable storage medium Download PDF

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Publication number
CN117544214B
CN117544214B CN202310584375.6A CN202310584375A CN117544214B CN 117544214 B CN117544214 B CN 117544214B CN 202310584375 A CN202310584375 A CN 202310584375A CN 117544214 B CN117544214 B CN 117544214B
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time
satellite
target
target satellite
power
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CN117544214A (en
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马小峰
张有广
蒋城飞
刘宇昕
刘金普
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NATIONAL SATELLITE OCEAN APPLICATION SERVICE
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NATIONAL SATELLITE OCEAN APPLICATION SERVICE
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18513—Transmission in a satellite or space-based system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Radio Relay Systems (AREA)

Abstract

The application discloses a satellite-to-ground data transmission method, device, equipment and readable storage medium, which are characterized in that the start time tms i of a target satellite at a time ts i which is later than the time ts i when the target satellite reaches the starting point of the target arc in the current circle and the shutdown time tme i which is earlier than the time te i when the target satellite leaves the end point of the target arc in the current circle are used for controlling the start and shutdown of the target satellite, the start and shutdown of the ground antenna are controlled based on the start time tas i and the shutdown time tae i of the ground antenna to the target satellite in the current circle, and the time tme i-tmsi is not less than the time required by the target satellite to transmit the data recorded in the time tme i‑1 to the start time tms i of the last circle of the current circle of the target satellite, so that the integrity of data transmission is ensured, and the waste of satellite battery energy, the waste of storage space of the ground antenna and the data file transmission time are reduced.

Description

Satellite earth data transmission method, device, equipment and readable storage medium
Technical Field
The present application relates to the field of satellite communications technologies, and in particular, to a method, an apparatus, a device, and a readable storage medium for satellite to ground data transmission.
Background
When the satellite flies around the earth, the satellite needs to observe data, the observed data is recorded in the satellite storage equipment, the recorded data is taken out from the satellite storage equipment when the satellite enters the arc section of the corresponding ground antenna, and the recorded data is transmitted to the ground antenna. Before the satellite enters the arc section, the time when the satellite enters the starting point of the arc section and the time when the satellite leaves the ending point of the arc section are usually determined, the satellite and the ground antenna are controlled to be started when the current time is the time when the satellite enters the starting point of the arc section, and the satellite and the ground antenna are controlled to be shut down when the current time is the time when the satellite leaves the ending point of the arc section, so that the satellite transmits recorded data to the ground antenna from the time when the satellite and the ground antenna are started to the time when the satellite and the ground antenna are shut down.
In general, in order to ensure that the satellite can fully transmit recorded data to the terrestrial antenna, the time required for the satellite to fully transmit the recorded data to the terrestrial antenna is smaller than the time difference between the moment when the satellite leaves the arc section and the moment when the satellite enters the arc section, when the satellite is fully transmitted to the terrestrial antenna, the satellite is still in an on state, which causes waste of battery energy of the satellite, and the satellite still sends signals to the terrestrial antenna after the satellite is fully transmitted to the terrestrial antenna, the terrestrial antenna also records the signals and records the signals on a storage device in the form of empty data frames, the empty data frames cause waste of storage space of the terrestrial antenna storage device, and the data transmitted by the satellite are stored in the same data file, the terrestrial antenna transmits the received data file to a data processing center after the receiving task is completed, the data in the data file is processed by the data processing center, the empty data frames in the data file increase the size of the data file and have no meaning to process the data, and the time for transmitting the data file is invalid to increase.
Disclosure of Invention
In view of the above, the present application provides a method, an apparatus, a device and a readable storage medium for transmitting satellite to ground data, which are used for solving the problem that the time for transmitting data files increases invalidity caused by the waste of battery energy of a satellite and the waste of storage space of a ground antenna storage device because the start time of the satellite is the time when the satellite enters the start point of an arc segment and the shutdown time is the time when the satellite leaves the end point of the arc segment.
In order to achieve the above object, the following solutions have been proposed:
A satellite-to-ground data transmission method, comprising:
Determining a target satellite of data to be transmitted in the current circle and a target arc section of a corresponding ground antenna;
Determining preset startup time tms i and shutdown time tme i of the target satellite at the current turn, wherein the startup time tms i is later than time ts i when the target satellite reaches the starting point of the target arc segment at the current turn, and the shutdown time tme i is not less than the time required by the target satellite to transmit the data recorded in the time tme i-1 from the shutdown time tme i-1 of the previous turn of the current turn to the startup time tms i when the target satellite leaves the ending point of the target arc segment at the current turn;
Determining preset startup time tas i and shutdown time tae i of the ground antenna to the target satellite of the current turn, wherein the startup time tas i is earlier than or equal to the startup time tms i, and the shutdown time tae i is later than or equal to the shutdown time tme i;
And controlling the target satellite to be started and shut down in the current circle based on the starting time tms i and the shutting down time tme i, and controlling the ground antenna to be started and shut down in the current circle based on the starting time tas i and the shutting down time tee i so that the target satellite transmits data to the ground antenna.
Preferably tme i-tmsi =tr+t1, tr is the pre-calculated time required for the target satellite to transmit its data recorded from the moment te i-1, which is the end of the previous arc of the previous turn, to the moment ts i, T1 being a pre-set time.
Preferably, the calculation process of the time Tr includes:
Determining the code rate Qs of the transmission data of the target satellite and the code rate Qo of the recording data of the target satellite;
Calculation time tr= (ts i-tei-1) Qo/Qs.
Preferably tms i-tsi＝tei-tmei.
Preferably, T1< (te i-tsi) Qo/Qs, where Qs is the code rate of the target satellite transmission data, and Qo is the code rate of the target satellite recording data.
Preferably, the calculating process of the power-on time tms i, the power-off time tme i, the power-on time tas i and the power-off time tee i includes:
The power-on time tms i is calculated based on the following formula:
tmsi＝{tsi+[tei-tsi-(tsi-tei-1)Qo/Qs]/2}-Tm；
The shutdown time tme i and the shutdown time tae i are calculated based on the following formula:
tmei＝taei＝{tei-[tei-tsi-(tsi-tei-1)Qo/Qs]/2}+Tm;
The start-up time tas i is calculated based on the following formula:
tasi＝{tsi+[tei-tsi-(tsi-tei-1)Qo/Qs]/2}-Ta；
Wherein, qs is the code rate of the data transmitted by the target satellite, qo is the code rate of the data recorded by the target satellite, and Tm and Ta are both preset times.
Preferably, the determining of the time ts i and the time te i includes:
Inquiring a preset first corresponding relation, and determining the time tsi of the target satellite corresponding to the target arc segment in the current circle when the current circle reaches the starting point of the target arc segment, wherein the first corresponding relation is used for representing the corresponding relation between the combination of the circle of the target satellite and the arc segment of the ground antenna and the time when the target satellite reaches the starting point of the arc segment;
Inquiring a preset second corresponding relation, and determining the moment tei of the target satellite corresponding to the target arc segment at the current circle, wherein the second corresponding relation is used for representing the corresponding relation between the combination and the moment of the target satellite leaving the end point of the arc segment.
Preferably, the determining process of the first correspondence and the second correspondence includes:
determining kepler six parameters of the target satellite;
determining antenna parameters of the ground antenna;
and inputting the kepler six parameters and the antenna parameters into a preset satellite orbit prediction model to obtain the first corresponding relation and the second corresponding relation.
A satellite-to-ground data transmission apparatus, comprising:
the satellite and arc segment determining unit is used for determining a target satellite of the data to be transmitted in the current circle and a target arc segment of the corresponding ground antenna;
A first power-on and power-off time determining unit, configured to determine preset power-on time tms i and power-off time tme i of the target satellite at the current turn, where the power-on time tms i is later than a time ts i when the target satellite reaches a start point of the target arc segment at the current turn, and the power-off time tme i is earlier than a time te i,tmei-tmsi when the target satellite leaves an end point of the target arc segment at the current turn and is not less than a time required by the target satellite to transmit data recorded in a time tme i-1 of the target satellite from a power-off time of a previous turn of the current turn to the power-on time tms i;
The second power-on and power-off time determining unit is configured to determine preset power-on time tas i and power-off time tae i of the ground antenna to the target satellite of the current turn, where the power-on time tas i is earlier than or equal to the power-on time tms i, and the power-off time tae i is later than or equal to the power-off time tme i;
the power-on and power-off control unit is used for controlling the target satellite to be powered on and powered off in the current circle based on the power-on time tms i and the power-off time tme i, and controlling the ground antenna to be powered on and powered off in the current circle based on the power-on time tas i and the power-off time tae i, so that the target satellite can transmit data to the ground antenna.
A satellite-to-ground data transmission device comprising a memory and a processor;
The memory is used for storing programs;
The processor is configured to execute the program to implement the steps of the satellite-to-ground data transmission method as described above.
A readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the satellite-to-ground data transmission method as described above.
As can be seen from the above technical solution, in the satellite-to-ground data transmission method provided by the embodiment of the present application, the target satellite of the current turn of data to be transmitted and the target arc segment of the corresponding terrestrial antenna are determined, the preset start time tms i and the shutdown time tme i of the target satellite of the current turn are determined, the preset start time tas i and the shutdown time tae i of the terrestrial antenna to the target satellite of the current turn are determined, the start and shutdown of the target satellite of the current turn are controlled based on the start time tms i and the shutdown time tme i, and controlling the ground antenna to be powered on and powered off in the current circle based on the power-on time tas i and the power-off time tae i so that the target satellite transmits data to the ground antenna. Because the power-on time tms i is later than the time ts i when the target satellite arrives at the start point of the target arc segment at the current turn, the power-off time tme i is earlier than the time te i when the target satellite leaves the end point of the target arc segment at the current turn, the waste of battery energy of the satellite is reduced, the signal sent by the satellite to the ground antenna after the data are completely transmitted to the ground antenna is reduced, the waste of the storage space of the ground antenna storage device and the time for transmitting the data file are reduced, meanwhile, the time difference between the power-off time tme i and the power-on time tms i is not less than the time required by the target satellite to transmit the data recorded in the time tme i-1 of the last turn of the current turn to the power-on time tms i, the preset ground antenna is earlier than or equal to the starting time tms i for the target satellite in the current turn, the shutdown time tae i is later than or equal to the shutdown time tme i, so that the target satellite can be ensured to transmit all data recorded in the time tme i-1 from the shutdown time tms i to the shutdown time tme i of the target satellite in the previous turn to the ground antenna, and the integrity of the data transmitted by the target satellite is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a satellite-to-ground data transmission method according to an embodiment of the present application;
FIG. 2 is a schematic illustration of an example of an instant of time according to an embodiment of the present application;
Fig. 3 is a schematic structural diagram of a satellite-to-ground data transmission device according to an embodiment of the present application;
fig. 4 is a block diagram of a hardware structure of a satellite-to-ground data transmission device according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The scheme of the application can be realized based on the terminal with the data processing capability, and the terminal can be a computer, a server, a cloud end and the like.
An embodiment of the present application provides a satellite-to-ground data transmission scheme, and a satellite-to-ground data transmission method of the present application is described below with reference to fig. 1, where the method may include:
Step S100, determining a target satellite of the data to be transmitted in the current circle and a target arc section of the corresponding ground antenna.
Specifically, when the satellite flies around the earth, data needs to be observed, the observed data is recorded in the satellite storage device, the recorded data is taken out from the satellite storage device when the satellite enters the receiving range of the corresponding terrestrial antenna, the recorded data is transmitted to the terrestrial antenna, the receiving range of the terrestrial antenna corresponding to the satellite is fixed for the satellite, for example, the receiving range of the terrestrial antenna B corresponding to the satellite A is a meshed area, the meshed area is composed of different arcs, the satellite can transmit the data to the terrestrial antenna in the process from the starting point of a certain arc of the terrestrial antenna B to the ending point of the arc, and the satellite possibly has different arcs in the receiving range of the terrestrial antenna B which enters in different circles, so that the target satellite of the data to be transmitted in the current circle and the target arc of the terrestrial antenna corresponding to the terrestrial antenna are determined, and the target arc is the arc of the terrestrial antenna which the target satellite enters in the current circle.
Step S110, determining preset power-on time tms i and power-off time tme i of the target satellite at the current turn, where the power-on time tms i is later than time ts i when the target satellite reaches the start point of the target arc segment at the current turn, the power-off time tme i is earlier than time te i when the target satellite leaves the end point of the target arc segment at the current turn, and a time difference between the power-off time tme i and the power-on time tms i is not less than a time required by the target satellite to transmit data recorded in the time tme i-1 of the last turn of power-off of the current turn to the power-on time tms i.
Specifically, the embodiment of the application presets the startup time tms i and the shutdown time tms i of the target satellite at the current turn so as to control the startup of the target satellite at the current turn based on the startup time tms i and control the shutdown of the target satellite at the current turn based on the shutdown time tms i, wherein i represents the current turn, considering that if the starting time of the satellite entering the arc segment is taken as the startup time of the satellite and the ending time of the satellite leaving the arc segment is taken as the shutdown time of the satellite, the time required by the satellite to actually transmit the recorded data to the ground antenna is smaller than the time difference between the time of the satellite leaving the arc segment and the time of the satellite entering the arc segment, the satellite battery energy is wasted, the satellite still transmits signals to the ground antenna after the data are completely transmitted to the ground antenna, the ground antenna records the signals on the storage device in the form of empty data frames, the storage space of the ground antenna storage device is wasted, and the ground antenna stores the signals and the data transmitted by the satellite in the same data file, so that the time for transmitting the data file by the ground antenna is increased inefficiently. Therefore, the preset starting time tms i of the target satellite in the current circle is later than the time ts i when the target satellite reaches the starting point of the target arc section in the current circle, the shutdown time tme i is earlier than the time te i when the target satellite leaves the ending point of the target arc section in the current circle, so as to reduce the waste of battery energy of the satellite, reduce the signal sent to the ground antenna by the satellite after the data are completely transmitted to the ground antenna, further reduce the waste of the storage space of the ground antenna storage device and the time for transmitting the data file, and simultaneously, the time difference between the shutdown time tme i and the starting time tms i is not less than the time required by the target satellite to transmit the data recorded in the time tme i-1 to the starting time tms i of the last circle of the current circle, the data recorded in the target satellite from the time tme i-1 of the previous turn of shutdown to the time tms i of the startup time tms i to the shutdown time tme i are all transmitted to the ground antenna by the target satellite, and the integrity of the data transmitted by the target satellite is ensured.
Step S120, determining a preset start time tas i and a shutdown time tae i of the ground antenna to the target satellite of the current turn, where the start time tas i is earlier than or equal to the start time tms i, and the shutdown time tae i is later than or equal to the shutdown time tme i.
Specifically, in the embodiment of the application, the starting time tas i and the shutdown time tae i of the ground antenna to the target satellite of the current turn are preset, so that the ground antenna is controlled to be started based on the starting time tas i and the ground antenna is controlled to be shut down based on the shutdown time tae i in the current turn. The startup time tas i can be earlier than the startup time tms i, the shutdown time tae i can be later than the shutdown time tme i so as to ensure the integrity of data transmitted by a target satellite received by the ground antenna, the startup time tas i can be earlier than the startup time tms i so as to avoid the problem of data loss caused by satellite lock loss, the startup time tas i can be equal to the startup time tms i, the shutdown time tae i can be equal to the shutdown time tme i, the integrity of data transmitted by the target satellite received by the ground antenna is ensured, and the consumption of electric energy of the ground antenna can be reduced.
Step S130, controlling the target satellite to turn on and off at the current turn based on the turn-on time tms i and the turn-off time tme i, and controlling the ground antenna to turn on and off at the current turn based on the turn-on time tas i and the turn-off time tee i, so that the target satellite transmits data to the ground antenna.
Specifically, after determining the turn-on time tms i and the turn-off time tme i corresponding to the current turn-on time tms i and the turn-off time tme i of the target satellite, the turn-on time tas i and the turn-off time tae i of the ground antenna on the current turn-on and turn-off of the target satellite on the current turn-on and turn-off time, the turn-on time tas i and the turn-off time tae i control the turn-on and turn-off of the ground antenna on the current turn-on and turn-off of the target satellite, that is, when the turn-on time tms i is reached, when the turn-off time tme i is reached, the turn-on of the target satellite is controlled, when the turn-on time tas i is reached, the turn-off of the ground antenna is controlled, and when the turn-off time tae i is reached, so that the target satellite transmits data to the ground antenna.
The satellite-to-ground data transmission method provided by the embodiment of the application determines the target satellite of the data to be transmitted in the current circle and the target arc section of the corresponding ground antenna, determines the preset starting time tms i and the shutdown time tme i of the target satellite in the current circle, determines the starting time tas i and the shutdown time tae i of the preset ground antenna to the target satellite in the current circle, controls the starting and shutdown of the target satellite in the current circle based on the starting time tms i and the shutdown time tme i, and controlling the ground antenna to be powered on and powered off in the current circle based on the power-on time tas i and the power-off time tae i so that the target satellite transmits data to the ground antenna. Because the power-on time tms i is later than the time ts i when the target satellite arrives at the start point of the target arc segment at the current turn, the power-off time tme i is earlier than the time te i when the target satellite leaves the end point of the target arc segment at the current turn, the waste of battery energy of the satellite is reduced, the signal sent by the satellite to the ground antenna after the data are completely transmitted to the ground antenna is reduced, the waste of the storage space of the ground antenna storage device and the time for transmitting the data file are reduced, meanwhile, the time difference between the power-off time tme i and the power-on time tms i is not less than the time required by the target satellite to transmit the data recorded in the time tme i-1 of the last turn of the current turn to the power-on time tms i, the preset ground antenna is earlier than or equal to the starting time tms i for the target satellite in the current turn, the shutdown time tae i is later than or equal to the shutdown time tme i, so that the target satellite can be ensured to transmit all data recorded in the time tme i-1 from the shutdown time tms i to the shutdown time tme i of the target satellite in the previous turn to the ground antenna, and the integrity of the data transmitted by the target satellite is ensured.
In the embodiment of the present application, the process of transmitting data to the terrestrial antenna by the target satellite in the current turn is described with reference to fig. 2, when the target satellite flies to time ts i in the current turn, the target satellite reaches the start point of the target arc segment of the terrestrial antenna, when the target satellite starts at time tas i, when the target satellite starts at time tms i, the target satellite starts to transmit data to the terrestrial antenna, when the target satellite starts at time tas i earlier than time tms i, the problem of data loss caused by satellite lock loss can be avoided, when the target satellite shuts down at time tme i, when the target satellite shuts down at time tae i, the terrestrial antenna shuts down tme i can be equal to tae i, when the target satellite stops transmitting data to the terrestrial antenna, and when the target satellite leaves the end point of the target arc segment at time te i.
Optionally, considering that the target satellite transmits the recorded data to the ground antenna from the turn-on time to the turn-off time of the current turn, where the recorded data is the data recorded from the turn-off time of the previous turn of the current turn to the turn-on time of the current turn, so that the time required for transmitting all the data recorded from the turn-off time of the previous turn to the turn-on time of the current turn to the ground antenna by the target satellite can be calculated, the time is the time difference between the turn-off time and the turn-on time of the current turn, and then the specific turn-on time and the turn-off time are determined according to the time, based on which the time difference between the turn-off time tme i and the turn-on time tms i can be the sum of a pre-calculated time Tr and a pre-set time T1, where Tr is the time required for the target satellite to transmit the data recorded from the time te i-1 of the end point of the previous arc of the previous turn to the time ts i.
Specifically, referring to fig. 2, ts i-1 is the time when the target satellite arrives at the start point of the previous arc corresponding to the previous turn, te i-1 is the time when the target satellite leaves the end point of the previous arc in the previous turn, ts i is the time when the target satellite arrives at the start point of the target arc in the current turn, te i is the time when the target satellite leaves the end point of the target arc in the current turn, and since the target satellite records data in the time te i-1 to the time ts i, the time Tr required for the target satellite to transmit the data recorded in the time te i-1 to the time ts i can be calculated, and since the target satellite is not powered on in the time te tme i-1 to the time te i-1 and is in the time ts i to the time tms i, but is in the powered off state, the time T1 can be set for receiving the data recorded by the target satellite, and the time difference between the time T tme i-1 of the current turn and the time tms 2 should be the time Tr 1 and the time tr=t58591+t96.
Optionally, the time T1 may be set by a worker, and the embodiment of the present application provides an interface for inputting the time T1, so that the worker inputs the time T1 in the interface, where the time T1 should satisfy:
T1<(tei-tsi)Qo/Qs。
Wherein, qs is the code rate of the data transmitted by the target satellite, and Qo is the code rate of the data recorded by the target satellite.
Alternatively, the calculation process of the time Tr may include:
And determining the code rate Qs of the transmission data of the target satellite and the code rate Qo of the recording data of the target satellite.
The time Tr is calculated based on the following formula:
Tr＝(tsi-tei-1)Qo/Qs。
Specifically, the code rate Qs of the data transmitted by the target satellite is the data amount that can be transmitted to the terrestrial antenna in the unit time of the target satellite, the code rate Qo of the data recorded by the target satellite is the data amount that can be recorded in the unit time of the target satellite, and since the target satellite records the data from the time te i-1 when the target satellite leaves the end point of the previous arc segment in the previous circle to the time ts i when the target satellite reaches the start point of the target arc segment in the current circle, the time required by the data amount recorded by the target satellite in the time te i-1 to ts i can be obtained by calculating the product of the difference between the time ts i and the time te i-1 and the code rate Qo of the data recorded by the target satellite, and the time required by the data amount recorded by the target satellite in the time te i-1 to ts i can be obtained by calculating the ratio of the data amount recorded by the target satellite in the time te i-1 to ts i.
Optionally, considering that the satellite has a relatively long receiving distance from the ground antenna at the time of entering the start point of the arc segment and the time of leaving the end point of the arc segment during the process of passing through the receiving range of the ground antenna, the satellite will have an adverse effect on data reception in the case of high weather or atmospheric humidity, and the receiving distance from the ground antenna becomes smaller gradually and the receiving quality is better during the moving process of the satellite to the midpoint position of the arc segment, based on this, tms i、tsi、tei、tmei satisfies, in order to improve the quality of data received by the ground antenna:
tmsi-tsi＝tei-tmei。
Specifically, since the time difference between the start time tms i and the time ts i is equal to the time difference between the time te i and the shutdown time tme i, the center time of the start time tms i and the shutdown time overlaps with the center time of the time ts i and the time te i, and the time ts i is the time when the target satellite arrives at the start point of the target arc segment at the current turn, and the time te i is the time when the target satellite leaves the end point of the target arc segment at the current turn, so that the position of the target satellite transmitting data to the ground antenna at the current turn is at the center position of the target arc segment, and the quality of the received data of the ground antenna can be improved.
In the embodiment of the application, the time difference between the starting time tms i and the time ts i is equal to the time difference between the time te i and the shutdown time tme i, so that the target satellite transmits data to the ground antenna at the central position of the target arc section, and the quality of the received data of the ground antenna is improved.
In the embodiment of the present application, a process for determining the above-mentioned time ts i and the above-mentioned time te i is described, and the process may include:
And inquiring a preset first corresponding relation, and determining the time ts i when the current circle number of the target satellite corresponding to the target arc section reaches the starting point of the target arc section, wherein the first corresponding relation is used for representing the corresponding relation between the combination of the circle number of the target satellite and the arc section of the ground antenna and the time when the target satellite reaches the starting point of the arc section.
Specifically, the embodiment of the application presets a first corresponding relation used for representing the corresponding relation between the combination of the circle number of the target satellite and the arc section of the ground antenna and the moment when the target satellite reaches the starting point of the arc section of the ground antenna, inquires the first corresponding relation, and can determine the moment ts i when the target satellite corresponding to the target arc section reaches the starting point of the target arc section in the current circle number.
And inquiring a preset second corresponding relation, and determining the time te i of the target satellite corresponding to the target arc segment at the current circle leaving the end point of the target arc segment, wherein the second corresponding relation is used for representing the corresponding relation between the combination and the time of the target satellite leaving the end point of the arc segment.
Specifically, the embodiment of the application further presets a second corresponding relation used for representing the corresponding relation between the combination of the circle number of the target satellite and the arc section of the ground antenna and the moment when the target satellite leaves the end point of the arc section of the ground antenna, inquires the second corresponding relation, and can determine the moment te i when the current circle number of the target satellite corresponding to the target arc section leaves the end point of the target arc section.
Optionally, kepler six parameters of the target satellite and antenna parameters of the ground antenna may be determined, and the kepler six parameters and the antenna parameters are input into a preset satellite orbit prediction model to obtain a first corresponding relationship and a second corresponding relationship.
The kepler six parameters can be an orbit semi-long axis, an orbit eccentricity, an orbit inclination angle, an ascending intersection point right ascent, a near-place amplitude angle and a near-corner angle, the antenna parameters can be coordinates, an elevation angle range and an azimuth angle range, and the satellite orbit prediction model can be an SGP4 satellite orbit prediction model.
In the embodiment of the application, the calculation formulas of the optional target satellite at the current turn-on time tms i and the turn-off time tme i of the current turn and the ground antenna corresponding to the target satellite for the current turn-on time tas i and the turn-off time tae i of the target satellite are respectively as follows:
tmsi＝{tsi+[tei-tsi-(tsi-tei-1)Qo/Qs]/2}-Tm
tmei＝taei＝{tei-[tei-tsi-(tsi-tei-1)Qo/Qs]/2}+Tm
tasi＝{tsi+[tei-tsi-(tsi-tei-1)Qo/Qs]/2}-Ta
Wherein, the time ts i is the time when the target satellite arrives at the starting point of the target arc segment at the current circle, the time te i is the time when the target satellite leaves the ending point of the target arc segment at the current circle, the time te i-1 is the time when the target satellite leaves the ending point of the previous arc segment at the previous circle of the current circle, the Qs is the code rate of the data transmitted by the target satellite, the Qo is the code rate of the data recorded by the target satellite, the Tm and Ta can be the time input by the pre-acquired staff, the time (ts i-tei-1) Qo/Qs' is the time required by the target satellite to transmit the data recorded from the time te i-1 to the time ts i, in order to make the position of the target satellite transmitting data to the ground antenna be at the center of the target arc segment and make the turn-on time tms i later than the time ts i, the turn-off time tme i is earlier than the time te i, so the "ts i+[tei-tsi-(tsi-tei-1) Qo/Qs ]/2" and the "te i-[tei-tsi-(tsi-tei-1) Qo/Qs ]/2" are calculated, since the target satellite is not turned on in the time ts i to the turn-on time tms i from the turn-off time tme i-1 to the time te i-1 of the previous round, but in the off state, data is also recorded, so that "ts i+[tei-tsi-(tsi-tei-1) Qo/Qs ]/2" is extended forward by Tm to obtain an on time tms i, and "te i-[tei-tsi-(tsi-tei-1) Qo/Qs ]/2" is extended backward by Tm to obtain an off time tme i, 2Tm is not less than the time required for the target satellite to transmit the data recorded when it is in the off state from the off time tme i-1 to the time te i-1 and from the time ts i to the on time tms i, and satisfies "2Tm < (te i-tsi) Qo/Qs", so that the finally calculated power-on time tms i is later than the time ts i, the power-off time tme i is earlier than the time te i, the time difference between the power-on time tme i and the power-on time tms i is not less than the time required for the target satellite to transmit the data recorded in the power-off time tme i-1 to the power-on time tms i, and the center time between the power-on time tms i and the power-off time, and the central time of the time ts i and the time te i are overlapped, so that the position of the target satellite for transmitting data to the ground antenna at the current circle is positioned at the central position of the target arc section, the 'ts i+[tei-tsi-(tsi-tei-1) Qo/Qs ]/2' is extended forwards by Ta, the starting time tas i is obtained, the Ta can be larger than the Tm, the starting time tas i is earlier than the starting time tms i, the problem of data loss caused by satellite unlocking can be avoided, the closing time tme i and the closing time tae i can be equal, so as to reduce the consumption of battery energy of the ground antenna.
The satellite-to-ground data transmission device provided by the embodiment of the application is described below, and the satellite-to-ground data transmission device described below and the satellite-to-ground data transmission method described above can be referred to correspondingly.
First, referring to fig. 3, a satellite-to-ground data transmission apparatus will be described, and as shown in fig. 3, the satellite-to-ground data transmission apparatus may include:
The satellite and arc segment determining unit 10 is used for determining a target satellite of the data to be transmitted in the current circle and a target arc segment of the corresponding ground antenna;
A first power-on and power-off time determining unit 20, configured to determine preset power-on time tms i and power-off time tme i of the target satellite at the current turn, where the power-on time tms i is later than a time ts i when the target satellite reaches a start point of the target arc segment at the current turn, and the power-off time tme i is earlier than a time te i,tmei-tmsi when the target satellite leaves an end point of the target arc segment at the current turn and is not less than a time required by the target satellite to transmit data recorded in a time tme i-1 of the target satellite from a power-off time of a previous turn of the current turn to the power-on time tms i;
A second power-on and power-off time determining unit 30, configured to determine a preset power-on time tas i and a power-off time tae i of the ground antenna to the target satellite of the current turn, where the power-on time tas i is earlier than or equal to the power-on time tms i, and the power-off time tae i is later than or equal to the power-off time tme i;
The power-on and power-off control unit 40 is configured to control the target satellite to power on and power off at the current turn based on the power-on time tms i and the power-off time tme i, and control the ground antenna to power on and power off at the current turn based on the power-on time tas i and the power-off time tae i, so that the target satellite transmits data to the ground antenna.
Optionally, tme i-tmsi =tr+t1, tr is a pre-calculated time required for the target satellite to transmit the data recorded from the time te i-1 from the end of the previous arc of the previous turn to the time ts i, and T1 is a preset time.
Optionally, the satellite-to-ground data transmission device may further include:
And the calculating unit of the time Tr is used for determining the code rate Qs of the transmission data of the target satellite and the code rate Qo of the recording data of the target satellite and calculating the time Tr= (ts i-tei-1) Qo/Qs.
Alternatively, tms i-tsi＝tei-tmei.
Optionally, T1< (te i-tsi) Qo/Qs, where Qs is the code rate of the target satellite transmission data, and Qo is the code rate of the target satellite recording data.
Optionally, the satellite-to-ground data transmission device may further include:
A time calculation unit for:
The power-on time tms i is calculated based on the following formula:
tmsi＝{tsi+[tei-tsi-(tsi-tei-1)Qo/Qs]/2}-Tm；
The shutdown time tme i and the shutdown time tae i are calculated based on the following formula:
tmei＝taei＝{tei-[tei-tsi-(tsi-tei-1)Qo/Qs]/2}+Tm;
The start-up time tas i is calculated based on the following formula:
tasi＝{tsi+[tei-tsi-(tsi-tei-1)Qo/Qs]/2}-Ta；
Wherein, qs is the code rate of the data transmitted by the target satellite, qo is the code rate of the data recorded by the target satellite, and Tm and Ta are both preset times.
Optionally, the satellite-to-ground data transmission device may further include:
A determining unit for determining a time ts i and a time te i, configured to:
Inquiring a preset first corresponding relation, and determining the time ts i when the current circle number of the target satellite corresponding to the target arc section reaches the starting point of the target arc section, wherein the first corresponding relation is used for representing the corresponding relation between the combination of the circle number of the target satellite and the arc section of the ground antenna and the time when the target satellite reaches the starting point of the arc section;
And inquiring a preset second corresponding relation, and determining the time te i of the target satellite corresponding to the target arc segment at the current circle leaving the end point of the target arc segment, wherein the second corresponding relation is used for representing the corresponding relation between the combination and the time of the target satellite leaving the end point of the arc segment.
Optionally, the satellite-to-ground data transmission device may further include:
the first corresponding relation and the second corresponding relation determining unit are used for:
determining kepler six parameters of the target satellite;
determining antenna parameters of the ground antenna;
and inputting the kepler six parameters and the antenna parameters into a preset satellite orbit prediction model to obtain the first corresponding relation and the second corresponding relation.
The satellite earth data transmission device provided by the embodiment of the application can be applied to satellite earth data transmission equipment. Referring to fig. 4, the hardware structure of the satellite-to-ground data transmission apparatus may include: at least one processor 1, at least one communication interface 2, at least one memory 3 and at least one communication bus 4;
In the embodiment of the application, the number of the processor 1, the communication interface 2, the memory 3 and the communication bus 4 is at least one, and the processor 1, the communication interface 2 and the memory 3 complete the communication with each other through the communication bus 4;
The processor 1 may be a central processing unit CPU, or a specific integrated circuit ASC (Applcaton SPECFC NTEGRATED Crcut), or one or more integrated circuits configured to implement embodiments of the present invention, etc.;
the memory 3 may comprise a high-speed RAM memory, and may also comprise a non-volatile memory (non-volatle memory) or the like, such as at least one disk memory;
Wherein the memory stores a program, the processor is operable to invoke the program stored in the memory, the program operable to: and realizing each processing flow in the satellite-to-ground data transmission scheme.
The embodiment of the present application also provides a readable storage medium storing a program adapted to be executed by a processor, the program being configured to: and realizing each processing flow in the satellite-to-ground data transmission scheme.
Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (11)

1. A satellite-to-ground data transmission method, comprising:
Determining a target satellite of data to be transmitted in the current circle and a target arc section of a corresponding ground antenna;
Determining preset startup time tms i and shutdown time tme i of the target satellite at the current turn, wherein the startup time tms i is later than time ts i when the target satellite reaches the starting point of the target arc segment at the current turn, and the shutdown time tme i is not less than the time required by the target satellite to transmit the data recorded in the time tme i-1 from the shutdown time tme i-1 of the previous turn of the current turn to the startup time tms i when the target satellite leaves the ending point of the target arc segment at the current turn;
Determining preset startup time tas i and shutdown time tae i of the ground antenna to the target satellite of the current turn, wherein the startup time tas i is earlier than or equal to the startup time tms i, and the shutdown time tae i is later than or equal to the shutdown time tme i;
And controlling the target satellite to be started and shut down in the current circle based on the starting time tms i and the shutting down time tme i, and controlling the ground antenna to be started and shut down in the current circle based on the starting time tas i and the shutting down time tee i so that the target satellite transmits data to the ground antenna.
2. The method according to claim 1, characterized in that tme i-tmsi = tr+t1, tr is a pre-calculated time required for the target satellite to transmit its data recorded from a moment te i-1 leaving the end of the previous arc of the previous turn to the moment ts i, T1 being a pre-set time.
3. The method of claim 2, wherein the calculation of the time Tr comprises:
Determining the code rate Qs of the transmission data of the target satellite and the code rate Qo of the recording data of the target satellite;
calculation time tr= (ts i-tei-1)Qo/Qs,tei-1 is the time when the previous turn left the end of the previous arc segment.
4. The method of claim 1, wherein tms i-tsi＝tei-tmei.
5. The method of claim 1, wherein T1< (te i-tsi) Qo/Qs, qs is a code rate of data transmitted by the target satellite, qo is a code rate of data recorded by the target satellite, and T1 is a preset time.
6. The method of claim 1, wherein the calculating of the power-on time tms i, the power-off time tme i, the power-on time tas i, and the power-off time tee i comprises:
The power-on time tms i is calculated based on the following formula:
tmsi＝{tsi+[tei-tsi-(tsi-tei-1)Qo/Qs]/2}-Tm,tei-1 The moment when the previous circle leaves the end point of the previous arc section;
The shutdown time tme i and the shutdown time tae i are calculated based on the following formula:
tmei＝taei＝{tei-[tei-tsi-(tsi-tei-1)Qo/Qs]/2}+Tm;
The start-up time tas i is calculated based on the following formula:
tasi＝{tsi+[tei-tsi-(tsi-tei-1)Qo/Qs]/2}-Ta；
Wherein, qs is the code rate of the data transmitted by the target satellite, qo is the code rate of the data recorded by the target satellite, and Tm and Ta are both preset times.
7. The method according to any one of claims 1-6, wherein the determination of the time ts i and the time te i comprises:
Inquiring a preset first corresponding relation, and determining the time ts i when the current circle number of the target satellite corresponding to the target arc section reaches the starting point of the target arc section, wherein the first corresponding relation is used for representing the corresponding relation between the combination of the circle number of the target satellite and the arc section of the ground antenna and the time when the target satellite reaches the starting point of the arc section;
And inquiring a preset second corresponding relation, and determining the time te i of the target satellite corresponding to the target arc segment at the current circle leaving the end point of the target arc segment, wherein the second corresponding relation is used for representing the corresponding relation between the combination and the time of the target satellite leaving the end point of the arc segment.
8. The method of claim 7, wherein the determining of the first correspondence and the second correspondence comprises:
determining kepler six parameters of the target satellite;
determining antenna parameters of the ground antenna;
and inputting the kepler six parameters and the antenna parameters into a preset satellite orbit prediction model to obtain the first corresponding relation and the second corresponding relation.
9. A satellite-to-ground data transmission apparatus, comprising:
the satellite and arc segment determining unit is used for determining a target satellite of the data to be transmitted in the current circle and a target arc segment of the corresponding ground antenna;
A first power-on and power-off time determining unit, configured to determine preset power-on time tms i and power-off time tme i of the target satellite at the current turn, where the power-on time tms i is later than a time ts i when the target satellite reaches a start point of the target arc segment at the current turn, and the power-off time tme i is earlier than a time te i,tmei-tmsi when the target satellite leaves an end point of the target arc segment at the current turn and is not less than a time required by the target satellite to transmit data recorded in a time tme i-1 of the target satellite from a power-off time of a previous turn of the current turn to the power-on time tms i;
The second power-on and power-off time determining unit is configured to determine preset power-on time tas i and power-off time tae i of the ground antenna to the target satellite of the current turn, where the power-on time tas i is earlier than or equal to the power-on time tms i, and the power-off time tae i is later than or equal to the power-off time tme i;
the power-on and power-off control unit is used for controlling the target satellite to be powered on and powered off in the current circle based on the power-on time tms i and the power-off time tme i, and controlling the ground antenna to be powered on and powered off in the current circle based on the power-on time tas i and the power-off time tae i, so that the target satellite can transmit data to the ground antenna.
10. A satellite-to-ground data transmission device comprising a memory and a processor;
The memory is used for storing programs;
The processor being configured to execute the program to perform the steps of the satellite-to-earth data transmission method according to any one of claims 1-8.
11. A readable storage medium having stored thereon a computer program, which, when executed by a processor, implements the steps of the satellite-to-ground data transmission method according to any one of claims 1-8.
CN202310584375.6A 2023-05-23 2023-05-23 Satellite earth data transmission method, device, equipment and readable storage medium Active CN117544214B (en)

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