CN106777158A - A kind of roomage state information sharing method and system based on web services - Google Patents
A kind of roomage state information sharing method and system based on web services Download PDFInfo
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- CN106777158A CN106777158A CN201611184354.1A CN201611184354A CN106777158A CN 106777158 A CN106777158 A CN 106777158A CN 201611184354 A CN201611184354 A CN 201611184354A CN 106777158 A CN106777158 A CN 106777158A
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- G—PHYSICS
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- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/95—Retrieval from the web
- G06F16/953—Querying, e.g. by the use of web search engines
- G06F16/9537—Spatial or temporal dependent retrieval, e.g. spatiotemporal queries
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
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- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/25—Integrating or interfacing systems involving database management systems
- G06F16/252—Integrating or interfacing systems involving database management systems between a Database Management System and a front-end application
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/80—Information retrieval; Database structures therefor; File system structures therefor of semi-structured data, e.g. markup language structured data such as SGML, XML or HTML
- G06F16/81—Indexing, e.g. XML tags; Data structures therefor; Storage structures
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Abstract
The present invention relates to a kind of roomage state information sharing method based on web services and system, belong to Spatial information processing technical field.The present invention is downloaded and parses the attribute and spacecraft TLE radical orbital datas of all cataloguing spacecrafts first, and result is stored in spacecraft information database；Then the spacecraft information network inquiry request that parsing user sends, obtaining user needs the demand of inquiry；Finally corresponding spacecraft attribute and orbital tracking are inquired about from spacecraft information database according to the demand, and spacecraft information inquiry result is organized into JSON or XML format file, user is returned to by http agreements.The present invention supports that lower Web Service standards provide public service by http agreements, can enable that the public is quick, accurate, convenient acquisition spacecraft information.
Description
Technical field
The present invention relates to a kind of roomage state information sharing method based on web services and system, belong at spatial information
Reason technical field.
Background technology
With developing rapidly for space technology, outer space has obtained extensive development and utilization.Various countries are emitted into outer
The spacecraft quantity of sheaf space is more and more.These spacecrafts, play in numerous areas such as remote sensing of the earth observation, navigation, communications
Extremely important effect.Carry out the pass of scientific research, society and economy activity with the spacecraft on space orbit and the mankind
More and more closely, increasing people needs to understand or obtain the current residing real time position of interested spacecraft in real time for system
And operation trend.Such as, navigation application is it should be understood that real-time position, the land resources monitoring use of GPS or big-dipper satellite
It should be understood that resources remote sensing satellite passes by, the period in certain region, radio amateur need to obtain the side that repeater satellite passes by family
Position and period etc..
In order to monitor these extraterrestrial targets in real time, each big country of the world puts into huge fund, has built track in large scale one after another
Target following and monitoring network.For example, North American Air Defense Command of the U.S. (NORAD) is just long-term to Resident Space Objects such as spacecrafts
Tracking, identification are carried out, has been arranged and is catalogued, and by website (celestrak.com and space-track.org) quasi real time
Externally issue the orbital tracking of cataloguing result and Two-type line form (Two Lines Elements, TLE).Using these tracks
Radical, user uses special software for calculation, can forecast position of the interested spacecraft within a period of time.But, at present
This work is completed, user needs to search the orbital tracking of satellite on website, and voluntarily carries out satellite using professional software
Track, process is not only cumbersome, complexity, and for amateur, due to being related to the coordinate system of complexity, time system
Conversion, cannot often obtain required roomage state information.
The content of the invention
It is an object of the invention to provide a kind of roomage state information sharing method based on web services, to solve current sky
Between situation information cannot accurately, the problem of quick obtaining.Present invention also offers a kind of roomage state information based on web services
Shared system.
The present invention provides a kind of roomage state information sharing method based on web services to solve above-mentioned technical problem,
The method is comprised the following steps：
1) download and parse the attribute and spacecraft TLE radical orbital datas of all cataloguing spacecrafts, and result is stored in
In spacecraft information database；
2) the spacecraft information network inquiry request that parsing user sends, obtaining user needs the demand of inquiry；
3) corresponding spacecraft attribute and orbital tracking are inquired about from spacecraft information database according to the demand, and will boat
Its device information inquiry result is organized into JSON or XML format file, and user is returned to by http agreements.
Further, when user has inquiry Space Vehicle position demand, the step 3) also need to believe according to from spacecraft
The query time section that the TLE orbital trackings and user's request for obtaining is inquired about in breath DBM calculates the position of spacecraft, and
The position result of calculation of spacecraft is organized into JSON or XML format file, user is returned to by http agreements.
Further, described step 3) in Space Vehicle position refer to spacecraft in J2000 geocentric inertial coordinate systems
Position, the positional information is that http-server module is calculated using SGP4/SDP4 computation models.
Further, when user inquires about spacecraft in geographic coordinate system position, the step 3) also need to spacecraft
Position in J2000 geocentric inertial coordinate systems is transformed into geographic coordinate system, the conversion formula for being used for：
Wherein M is Ghandler motion matrix, and G is Greenwich apparent time matrix, and N is nutating matrix, and P is precession of the equinoxes matrix,It is coordinate of the spacecraft under geographic coordinate system,It is spacecraft in J2000 Earth central inertials
Coordinate in coordinate system.
Further, the step 1) in spacecraft information database built using MariaDB, spacecraft information database
Module polls are conducted interviews using Qt C++.
Present invention also offers a kind of roomage state information sharing system based on web services, the shared system includes boat
Its device information downloading module, spacecraft information data library module and http-server module,
Described spacecraft information downloading module is used to download and parse the attribute and spacecraft TLE of all cataloguing spacecrafts
Radical orbital data；
Described spacecraft information data library module is used to be stored in the spacecraft that spacecraft information downloading module is downloaded
Attribute and spacecraft TLE radical orbital datas, and for http-server module provides inquiry service；
Described http-server module is used to parse the spacecraft information network inquiry request of user's transmission, obtains user
The demand of inquiry is needed, corresponding spacecraft attribute and track root are inquired about from spacecraft information data library module according to the demand
Number, and spacecraft information inquiry result is organized into JSON or XML format file, user is returned to by http agreements.
Further, when user has inquiry Space Vehicle position demand, described http-server module also needs to basis
The query time section that the TLE orbital trackings and user's request for obtaining is inquired about from spacecraft information data library module calculates spacecraft
Position, and the position result of calculation of spacecraft is organized into JSON or XML format file, use is returned to by http agreements
Family.
Further, described Space Vehicle position refers to position of the spacecraft in J2000 geocentric inertial coordinate systems, should
Positional information is that http-server module is calculated using SGP4/SDP4 computation models.
Further, when user inquires about spacecraft in geographic coordinate system position, described http-server module is also needed
Position of the spacecraft in J2000 geocentric inertial coordinate systems is transformed into geographic coordinate system, the conversion formula for being used for：
Wherein M is Ghandler motion matrix, and G is Greenwich apparent time matrix, and N is nutating matrix, and P is precession of the equinoxes matrix,It is coordinate of the spacecraft under geographic coordinate system,For spacecraft is sat in J2000 Earth central inertials
Coordinate in mark system.
Further, described spacecraft information data library module is built using MariaDB, spacecraft information database mould
Block inquiry is conducted interviews using Qt C++.
The beneficial effects of the invention are as follows:The present invention is downloaded and parses the attribute and spacecraft of all cataloguing spacecrafts first
TLE radical orbital datas, and result is stored in spacecraft information database；Then the spacecraft Information Network that parsing user sends
Network inquiry request, obtaining user needs the demand of inquiry；Finally phase is inquired about according to the demand from spacecraft information database
Spacecraft attribute and orbital tracking are answered, and spacecraft information inquiry result is organized into JSON or XML format file, passed through
Http agreements return to user.Web Service standards under the present invention is supported by http agreements provide public service, can
Enable that the public is quick, accurate, convenient obtain spacecraft information.
Additionally, the public does not need download tracks radical, it is not required that carry out the orbit computation of complexity, it is possible to convenient, fast
The roomage state information such as the attribute of spacecraft, real time position, following running orbit interested in prompt acquisition.
Brief description of the drawings
Fig. 1 is the flow chart of the roomage state information sharing method based on web services；
Fig. 2 is http-server fundamental diagram.
Specific embodiment
Specific embodiment of the invention is described further below in conjunction with the accompanying drawings.
The embodiment of roomage state information sharing method of the present invention based on web services
In order to allow the public quickly, accurately, easily to obtain spacecraft real time position with following moving law, the present invention is carried
A kind of roomage state information sharing method based on web services is supplied, quasi real time synchronization NORAD is newest by internet for the method
Inventory information and orbital tracking, and complicated orbit computation is completed in server, the Web under being supported by standard http agreements
Service standards, for the public provides shared data, the public does not need download tracks radical, it is not required that carry out the track of complexity
Calculate.And internet is available with, by being input into simple parameter, it is possible to easily and efficiently obtain interested spacecraft
The roomage state information such as attribute, real time position, following running orbit.The flow of the method as shown in figure 1, specific implementation step such as
Under.
1. spacecraft attribute and spacecraft TLE orbital tracking data are downloaded.
Spacecraft attribute is to ensure that roomage state services the important way of Up-to-date state with renewal with the download of TLE orbital trackings
Footpath, the present invention ensures spacecraft attribute information by Celestrak websites respectively, by space-track network address synchronization TLE rails
Road radical information is consistent with the newest result of detection in the U.S. to ensure spacecraft information, and the present invention was the cycle with 1 day, automatic connection
Celestrak and space-track.com websites, download and parse the attribute and Two-type line rail of all cataloguing spacecrafts automatically
Track data.
Celestrak websites are in network address http:Spacecraft is stored in //celestrak.com/pub/satcat.txt
Etc. the cataloguing and attribute information of the newest result of detection of all extraterrestrial targets, the attribute information of spacecraft is as shown in table 1.
Table 1
Space-track.org websites can provide the real-time download function of TLE orbital trackings, and download address is as follows：
https://www.space-track.org/basicspacedata/query/class/tle_latest/
ORDINAL/1/EPOCH/%3Enow-30/orderby/NORAD_CAT_ID/format/3l e
Timing daily of the invention downloads satellite attribute data and TLE orbital trackings data to locally automatically by internet,
Fusion is associated with the spacecraft ID numberings in TLE data further according to attribute data, unified, consistent tables of data is formed, is stored in
In " SAT " tables of data of spacecraft information database, the tables of data can be used as the core data source of roomage state service.
2. the spacecraft information network inquiry request that parsing user sends, obtaining user needs the demand of inquiry.
User of the present invention initiates inquiry request by the Web Service that http-server is provided, specifically, such as Fig. 2 institutes
Show, client transmit a request to http server by client, http Listener receive connection, create http Processor
Object；Client's request data in tcp connections is read by http Processor objects, and utilizes HttpRequestDecoder
Data are decoded into HttpRequest objects；Http Processor objects are according to HttpRequest object acquisition user's needs
The demand of inquiry, inquires about the attribute and TLE orbital trackings of spacecraft from spacecraft information database according to demand.
3. corresponding spacecraft attribute and orbital tracking are inquired about from spacecraft information database according to the demand.
Spacecraft information database builds storage spacecraft information database, the database using MariaDB in the present embodiment
Accessed using Qt C++, spacecraft information database queries key step includes：It is first turned on database, builds SQL query language
Sentence, execution three steps of data base querying.Using the addDatabase (" QMYSQL ", " of QSqlDatabase
SmariadbObject ") function and open () function, database can be opened；Then according to SQL statement rule, field name
Claim and user's request, construct query SQL sentence and QSqlQuery objects；The exec functions for recalling QSqlQuery objects are held
Row data base querying works.QSqlQuery objects are that can obtain Query Result, according to field name and index, obtain inquiry
Field value.
If user have inquiry satellite position demand, it is necessary to according to inquired about from database the TLE orbital trackings that obtain and
The query time section of user's request, calculates the position of spacecraft, and the requirement according to user input to result coordinate system, conversion
To corresponding coordinate system.
Ripe, international TLE orbit computation methods use the SGP4/ of NORAD and NASA issues at present
SDP4 computation models, SGP4/SDP4 computation models taken into full account general perturbation include regional ellipticity, lunisolar attraction long-term and
Periodic perturbation influences, and the gravitation resonance and track decline that atmospheric drag is produced.It is small that wherein SGP4 is mainly used in the orbital period
In the LEO object of 225 minutes, SDP4 was used for the orbit computation of Earth's orbit object of the orbital period more than 225 minutes.
The TLE orbital trackings of acquisition and moment are brought into the model, you can be calculated the spacecraft at corresponding moment in J2000 the earth's core
Position and speed in inertial coodinate system.
For many sector applications, it would be desirable to obtain spacecraft geographic coordinate system (such as ECEF coordinate system or
WGS latitude and longitude coordinates system etc.) in position, this is accomplished by spacecraft for being obtained to TLE orbit computations and is sat in J2000 Earth central inertials
Position in mark system (ECI) carries out origin coordinate system transform.It is described when user inquires about spacecraft in geographic coordinate system position
The position that http-server module is also needed to by spacecraft in J2000 geocentric inertial coordinate systems is transformed into geographic coordinate system, institute
The conversion formula for using for：
Wherein M is Ghandler motion matrix, and G is Greenwich apparent time matrix, and N is nutating matrix, and P is precession of the equinoxes matrix,It is coordinate of the spacecraft under geographic coordinate system,It is spacecraft in J2000 Earth central inertials
Coordinate in coordinate system.
4. the spacecraft attribute and the Query Result of orbital position that will be obtained return to client by http agreements.
The present invention builds Web Service clothes using REST (RepresentationalState Transfer) mode
Business.The mode of client http request data by the way of URI (uniform resource identifier), the web of addressing space situation information
Service.Specific form is as follows：
http://hostname:port/scJson=queryJsonString
Wherein, hostname is server ip or domain name, and port is port numbers, such as:www.cnssa.cn:8080.
" sc " be present invention provide that inquiry spacecraft information keyword, represent spacecraft, service end application program can basis
The identifier calls spacecraft to inquire about and orbit computation function, and identifier " sc " has a parameter " json ", its value
QueryJsonString is json format strings, the demand for sending inquiry to server end.queryJsonString
Middle json field formats explanation such as table 2.
Table 2
When wherein jsonp is true, inquiring about the json format strings for returning can be positioned over the bracket of " callback () "
In, supported for cross-domain access of webpage.Non- webpage client, without callback keywords, will jsonp be set to false
.Query is nested with a json form querying condition, and wherein field is as shown in table 3.
Table 3
By said process, user can inquire about spacecraft attribute and orbital data according to self-demand.If for example, user
Inquire about the attribute information of Chinese (PRC) all satellites, it is possible to use following form http request：
http://hostname:8800/scJson={ " method ":"query","jsonp":true,"query":
{"owner":"PRC","status":"Active"}}
For another example, Chinese (PRC) all satellites are inquired about in 2016-08-1903:21:11 arrive 2016-08-1903:51:When 11
Between in section, the step-length orbital data of 60 seconds uses following request form.
http://hostname:8800/scJson={ " method ":"query","query":{"jsonp":
true,"status":"Active","orbit":1,"mission":"Navigation","start":"2016-08-
19T03:21:11","stop":"2016-08-19T03:51:11","step":60}}
After user submits above-mentioned formatted request to, server will return to inquiry by http agreements with the form of json arrays
And result of calculation.Form is as follows：
callback([resultJsonString1,resultJsonString2,resultJsonString3…]
Each unit (resultJsonString) of array is that a spacecraft is inquired about and result of calculation,
As shown in table 4, " callback () " is gone out when jsonp is true in querying condition to resultJsonString explanation of fields
It is existing, it is mainly used in the cross-domain access of webpage.
Table 4
Wherein orbitdata=[T, X, Y, Z, VX, VY, VZ, Lat, Lon, Alt ...] is orbit computation result array, often
10 numbers are one group, represent [T, X, Y, Z, VX, VY, VZ, Lat, Lon, Alt] respectively, and wherein T is initial time to current time
Number of seconds, X, Y, Z represent position of the spacecraft in moment J2000 geocentric inertial coordinate systems, and VX, VY, VZ represent spacecraft
Speed in moment J2000 geocentric inertial coordinate systems, Lat, Lon, Alt represent spacecraft in moment WGS84 coordinate systems
In latitude, longitude, height.In return value, the spacecraft attribute information comprising user's inquiry, also comprising specifying that user needs
The positional information of time period, user is by building http querying conditions, you can obtain user's spacecraft information of concern and
Specifying the positional information at moment.
The embodiment of roomage state information sharing system of the present invention based on web services
Shared system in the present embodiment includes spacecraft information downloading module, spacecraft information data library module and http
Server module, spacecraft information downloading module is used to download and parse the attribute and spacecraft TLE roots of all cataloguing spacecrafts
Number orbital data；Spacecraft information data library module is used to be stored in the attribute of the spacecraft that spacecraft information downloading module is downloaded
With spacecraft TLE radical orbital datas, and for http-server module provide inquiry service；Http-server module is used to parse
The spacecraft information network inquiry request that user sends, obtaining user needs the demand of inquiry, according to the demand from spacecraft
Corresponding spacecraft attribute and orbital tracking are inquired about in information data library module, and spacecraft information inquiry result is organized into JSON
Or XML format file, user is returned to by http agreements.Each module implements means in the embodiment of method
It has been be described in detail that, repeated no more here.
The present invention passes through the internet quasi real time newest inventory informations of synchronization NORAD and orbital tracking, and complete in server
Into complicated orbit computation, the Web Service standards under being supported by standard http agreements, there is provided public service；The public is not
Need download tracks radical, it is not required that carry out the orbit computation of complexity, and be available with internet, by the simple ginseng of input
Number, it is possible to easily and efficiently obtain the roomage state letters such as attribute, real time position, the following running orbit of interested spacecraft
Breath.The present invention effectively increases roomage state information public service level, is more industries and personal Shared space technology hair
Exhibition brings facility.
Claims (10)
1. a kind of roomage state information sharing method based on web services, it is characterised in that the method is comprised the following steps：
1) download and parse the attribute and spacecraft TLE radical orbital datas of all cataloguing spacecrafts, and result is stored in space flight
In device information database；
2) the spacecraft information network inquiry request that parsing user sends, obtaining user needs the demand of inquiry；
3) corresponding spacecraft attribute and orbital tracking are inquired about according to the demand from spacecraft information database, and by spacecraft
Information inquiry result is organized into JSON or XML format file, and user is returned to by http agreements.
2. the roomage state information sharing method based on web services according to claim 1, it is characterised in that work as user
When having inquiry Space Vehicle position demand, the step 3) also need to what is obtained according to the inquiry from spacecraft information data library module
The query time section of TLE orbital trackings and user's request calculates the position of spacecraft, and by the position result of calculation group of spacecraft
JSON or XML format file are made into, user is returned to by http agreements.
3. the roomage state information sharing method based on web services according to claim 2, it is characterised in that described
Step 3) in Space Vehicle position refer to position of the spacecraft in J2000 geocentric inertial coordinate systems, the positional information is http
Server module is calculated using SGP4/SDP4 computation models.
4. the roomage state information sharing method based on web services according to claim 3, it is characterised in that work as user
Inquiry spacecraft at geographic coordinate system position, the step 3) also need to spacecraft in J2000 geocentric inertial coordinate systems
Position be transformed into geographic coordinate system, the conversion formula for being used for：
Wherein M is Ghandler motion matrix, and G is Greenwich apparent time matrix, and N is nutating matrix, and P is precession of the equinoxes matrix,It is coordinate of the spacecraft under geographic coordinate system,It is spacecraft in J2000 Earth central inertials
Coordinate in coordinate system.
5. the roomage state information sharing method based on web services according to claim 1, it is characterised in that the step
It is rapid 1) in spacecraft information database built using MariaDB, spacecraft information database module polls are carried out using Qt C++
Access.
6. a kind of roomage state information sharing system based on web services, it is characterised in that the shared system includes spacecraft letter
Breath download module, spacecraft information data library module and http-server module,
Described spacecraft information downloading module is used to download and parse the attribute and spacecraft TLE radicals of all cataloguing spacecrafts
Orbital data；
Described spacecraft information data library module is used to be stored in the attribute of the spacecraft that spacecraft information downloading module is downloaded
With spacecraft TLE radical orbital datas, and for http-server module provide inquiry service；
Described http-server module is used to parse the spacecraft information network inquiry request of user's transmission, and obtaining user needs
The demand of inquiry, corresponding spacecraft attribute and orbital tracking are inquired about according to the demand from spacecraft information data library module,
And spacecraft information inquiry result is organized into JSON or XML format file, user is returned to by http agreements.
7. the roomage state information sharing system based on web services according to claim 6, it is characterised in that work as user
When having inquiry Space Vehicle position demand, described http-server module is also needed to according to from spacecraft information data library module
The query time section of the TLE orbital trackings that obtain of inquiry and user's request calculates the position of spacecraft, and by the position of spacecraft
Result of calculation is organized into JSON or XML format file, and user is returned to by http agreements.
8. the roomage state information sharing system based on web services according to claim 7, it is characterised in that described
Space Vehicle position refers to position of the spacecraft in J2000 geocentric inertial coordinate systems, and the positional information is http-server mould
Block is calculated using SGP4/SDP4 computation models.
9. the roomage state information sharing system based on web services according to claim 8, it is characterised in that work as user
At geographic coordinate system position, described http-server module also needs to be used to spacecraft in J2000 the earth's core inquiry spacecraft
Position in property coordinate system is transformed into geographic coordinate system, the conversion formula for being used for：
Wherein M is Ghandler motion matrix, and G is Greenwich apparent time matrix, and N is nutating matrix, and P is precession of the equinoxes matrix,It is coordinate of the spacecraft under geographic coordinate system,It is spacecraft in J2000 Earth central inertials
Coordinate in coordinate system.
10. the roomage state information sharing system based on web services according to claim 6, it is characterised in that described
Spacecraft information data library module is built using MariaDB, and spacecraft information database module polls are visited using Qt C++
Ask.
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