CN105608259A - Ground processing system for low-low tracking gravity measurement satellites - Google Patents

Abstract

The invention belongs to the technical field of gravity measurement of satellites and particularly relates to a ground processing system for low-low tracking gravity measurement satellites. The system comprises a platform branch system, a business branch system and a demonstration branch system, wherein the platform branch system is used for receiving and unpacking original simulation data, managing and distributing the data and tasks and particularly comprises a data receiving subsystem, a data managing subsystem, a task managing subsystem and a product distributing subsystem; the business branch system is used for carrying out graded processing on the simulation data and particularly comprises a data preprocessing subsystem, a data processing subsystem and a three-grade product producing subsystem; and the demonstration branch system is used for carrying out visual monitoring on the simulation data and carrying out visual display on data products. The system has the advantages that the original simulation data can be received and unpacked; the archival storage and the distribution service of data products of different grades are realized; the job scheduling function of data processing modules is provided; the production function of three-grade products is provided; and two-dimensional and three-dimensional display functions of gravitational field products are realized.

Description

Low tracking Gravisat Ground Processing System

Technical field

The invention belongs to satellite gravity survey technical field, be specifically related to a kind of low tracking gravity measurement and defendStar Ground Processing System.

Background technology

Obtain substance aspect earth gravitational field and entered surveying based on Gravity Satellite measuring technique in the worldStep, successively on July 15th, 2000, on March 17th, 2009, Successful Practice height-low satellite followTrack satellite gravity survey pattern (CHAMP, GOCE), on March 7th, 2002, Successful Practice low-low tracking satellite gravity measurement pattern (GRACE), and make full use of these Satellite Observations, withTime be aided with the data that other measurement means gathers, successfully solution multiple high accuracy building global gravitational field models of letting it pass(comprise static weight field model and time become gravity field model). At present, the mechanism such as the U.S., European Space Agency existsThe more high-precision satellite gravity survey plan of the implementing plan next generation.

At home, the numerous scholars of China are recovering the theoretical and side of earth gravitational field based on satellite gravity surveyBroad research has also been carried out in method aspect, through the data processing tackling problems in key technologies of more than ten years, has broken throughThe key technologies such as Gravity Satellite precise orbit determination, gravitational field recovery, and successfully developed based on dynamic method etc. extensiveThe utility software of multiple earth gravitational field, has especially completed the great satellite gravity survey data of difficulty and has recovered" one-step method " tackling key problem of earth gravitational field, has successfully developed prototype software, and has utilized CHAMP, GRACEMultiple earth gravity field models are built etc. measured data. Visible, domesticly manage in Gravity Satellite data processingOpinion and method aspect have obtained abundant achievement in research, and have accumulated rich experience.

However, but because external Gravity Satellite associated mechanisms is in the time announcing actual measurement Satellite Observations,Maintain secrecy to consider to wait based on multiple technologies and do not announce original observed data, 0 grade of observation data, 1A level and observeThe measured datas such as data, do not announce detailed treatment theory and the correlation process method of above-mentioned these data yet.And 1B DBMS and gravity field model data are only announced. At present, domestic not yet carry out comprising originalThe research of the generation of observation data, 0 DBMS and processing, the processing of 1A DBMS etc.; Not yet carry out gravityThe Verification Project researchs such as satellite data emulation and processing. In addition, domesticly there is no complete Gravity Satellite dataProcess software, mostly most achievements in research are to rest on the data processing function of modules, not by different levelsThe processing of gravimetric data is cascaded, and forms integrated data processing and demo system.

In view of generation and the processing of Gravity Satellite original observed data, 0 DBMS, the processing of 1A DBMSCan not obtain by introduction etc. technology, must rely on autonomous solution, and the realization of this technology is straight simultaneouslyConnect decision China success and realize satellite gravity survey plan. In addition, domesticly there is no complete gravity and defendSing data process software. Therefore, developing integrated Gravisat data handling system will have heavilyWant meaning.

Summary of the invention

The object of the invention is to the defect and the deficiency that exist for prior art, a kind of low tracking is providedGravisat Ground Processing System provides the integrated treatment merit to GRACE1B DBMS simultaneouslyEnergy.

For achieving the above object, the present invention is by the following technical solutions:

Platform subsystem, for original emulated data is received and unpacked, and enters data and taskLine pipe reason is distributed, and comprises data receiver subsystem, data administration subsystem, task management subsystem and productProduct distribution subsystem;

Business subsystem, for emulated data is carried out to processing at different levels, comprise data preprocessing subsystem,Data process subsystem and three grades of production subsystems;

Demonstration subsystem, for emulated data is carried out to visual control, carries out visual to data productShow.

Further, in described business subsystem:

Data preprocessing subsystem, for the data of data receiving subsystem output are carried out to pretreatment, rawBecome 1A, 1B, 1C DBMS, and data after treatment are inputed to data process subsystem;

Data process subsystem comprises precise orbit determination module, load calibration module and gravitational field inverting module,The 1B DBMS producing by precise orbit determination module logarithm Data preprocess subsystem carries out precise orbit determination; LogicalCrossing calibration module demarcates 1C DBMS; By gravitational field inverting module, 1C DBMS is carried out to weightField of force inverting, generates gravity field model;

Three grades of production subsystems, enter for the gravity field model data that data process subsystem is generatedRow is processed, and obtains three grades of products of gravity field data, and provides data input for demonstrating subsystem.

Further, three grades of products of described gravity field data comprise gravity anomaly, geoidal height and hang downThree kinds of data products of line deviation.

Further, described data preprocessing subsystem comprises:

1A DBMS pretreatment module, for the treatment of 0 DBMS, model 0 DBMS output quantity withConversion analytic relationship between the observed quantity that data processing needs, then relates in Accurate Calibration analytical relationAnd conversion parameter, finally implement the conversion of all kinds of observed quantities;

1B DBMS pretreatment module, for 1A DBMS is carried out the combination of Correction of Errors, observation,The operations such as breach interpolation, elimination of rough difference;

1C DBMS pretreatment module, for carrying out in drift correction, sampling, data 1B DBMSInsert, the operation such as origin coordinate system transform and time system conversion.

Further, described data receiver subsystem, for receiving original emulated data, generates 0 progressionAccording to;

Described data administration subsystem, for realizing data receiver subsystem received data, GRACE1BThe filing management of DBMS and data products at different levels;

Described task management subsystem, for the scheduling to the each data processing module of business subsystem, orderEstablishment, order monitoring;

Described product distribution subsystem, for the distribution function to gravity satellite data product, is demonstration pointThe demonstration that system is carried out satellite simulation data demonstrating and gravity product provides Data support, simultaneously for user carriesFor services such as data query, data download, data subscription, order managements.

Compared with prior art, the present invention has following useful technique effect: divide and be by platform is setSystem, can be to the processing that receives and unpack of the original emulated data of Gravity Satellite, and can realize at different levelsThe filing storage of data product, and distribution services to data products at different levels, and to data processings at different levelsThe job scheduling function of module. By business subsystem is set, emulated data is carried out to processing at different levels, andObtain corresponding data product, three grades of production functions are provided. And by demonstration subsystem, energyEnough two-dimentional 3-D graphic display functions of realizing gravitational field product.

Brief description of the drawings

Fig. 1 is system composition diagram of the present invention;

Fig. 2 is business subsystem data flow graph of the present invention;

Fig. 3 is the two-dimentional bandwagon effect figure of three grades of products of gravitational field of the present invention;

Fig. 4 is the three-dimensional display design sketch of three grades of products of gravitational field of the present invention.

Detailed description of the invention

Below in conjunction with accompanying drawing, the present invention is described in further detail.

Referring to Fig. 1, the present invention is designed to three large subsystems by function logic, be successively platform subsystem,Business subsystem and demonstration subsystem.

Platform subsystem, for original emulated data is received and unpacked, and carries out task management,Comprise data receiver subsystem, data administration subsystem, task management subsystem and product distribution subsystem;Wherein mainly to realize low tracking Gravisat semi-physical system original imitative for data receiver subsystemThe reception of true data and unpacking; Data administration subsystem mainly realize data receiver subsystem received data,The filing management of GRACE1B DBMS and data products at different levels; It is right that task management subsystem is mainly realizedThe scheduling of the each data processing module of business subsystem, order establishment, order monitoring; Product distribution subsystemMainly realize the distribution function to gravity satellite data product, for demonstration subsystem is carried out satellite simulation dataThe demonstration of demonstration and gravity product provides Data support, download for user provides data query, data, simultaneouslyThe service such as data subscription, order management.

Business subsystem, for emulated data is carried out to data processings at different levels, comprises data pretreatment subsystemSystem, data process subsystem and three grades of production subsystems.

Wherein data preprocessing subsystem is subdivided into again 1A DBMS according to handled data rank and locates in advanceReason module, 1B DBMS pretreatment module and 1C DBMS pretreatment module; Processing subsystem is according to instituteThe business function completing is subdivided into again precise orbit determination module, load calibration module and gravitational field inverting module;Three grades of production subsystems are subdivided into again gravity anomaly module, large according to completed business function equallyGround-level module and deviation of plumb line module. Each data processing module function is described in detail as follows:

A. data preprocessing subsystem mainly to satellite simulation data carry out down-sampled, filtering, phase difference,The operations such as error correction, difference, relative time error, format conversion, data completion and elimination of rough difference, successivelyGenerate 1A, 1B, 1C DBMS, for data process subsystem provides data input.

B. to be mainly that data after logarithm Data preprocess subsystem processes are carried out precision fixed for data process subsystemThe operations such as rail, calibration and gravitational field inverting.

C. three grades of earth gravity field model numbers that production subsystem mainly generates gravitational field inverting moduleAccording to operating, generate the data such as geoidal height, the deviation of plumb line and gravity anomaly.

Data preprocessing subsystem has been used for the processing from 0 DBMS to 1C DBMS, concrete functionAs follows:

1) 1A DBMS pretreatment

0 DBMS is the direct observation information of load, and not exclusively possesses clear and definite physical significance, for example, accelerateThe observation of degree meter is the signal of telecommunication, need to utilize the corresponding Transformation Parameters of each load to implement conversion, and generation hasSpecify the observed quantity of physical significance, 1A DBMS pretreatment module is exactly for realizing this translation function, itsThe processing scheme adopting is: the observed quantity of model each load hardware output quantity and data processing needs itBetween conversion analytic relationship, the conversion parameter then relating in Accurate Calibration analytical relation, finally implementThe conversion of all kinds of observed quantities.

2) 1B DBMS pretreatment

Because 1A DBMS not yet carries out Correction of Errors, observation combination, breach interpolation, elimination of rough differenceDeng operation, can not be directly used in gravitational field inverting. Therefore, need to complete 1A DBMS to 1B DBMSProcessing, and 1B DBMS pretreatment module is for realizing this function.

1A level is very strong to processing scheme and the load dependence of 1B DBMS, and different loads needs different mistakesPoor correction scheme, for example ACC data pretreating scheme, GNSS data pretreating scheme, KBR numberData preprocess scheme and SCA data pretreating scheme.

ACC data pretreating scheme: first value and scale factor correction are partially carried out in observation to accelerometer(completing the demarcation of inclined to one side value and scale factor), further implements temperature correction, the correction of igniting correction equal error,Then carry out the operations such as elimination of rough difference, data smoothing, interpolation, ultimate analysis data after treatment, assessmentIts quality, confirms pretreating scheme reliability.

GNSS data pretreating scheme: preliminary definite, the cycle slip that comprises elimination of rough difference, receiver clock correctionIdentification and mark.

KBR data pretreating scheme: first utilize one way Bidirectional observation data to be combined into interstellar distance and starBetween speed data, then adopt double frequency combined method to carry out ionosphere correction, further implement eccentricity correction,Antenna phase center corrects, the correction of temperature correction equal error, then carries out elimination of rough difference, data smoothing, rawRanging data between Cheng Xing, ranging data between ultimate analysis star after treatment, assesses its quality, confirms to locate in advanceReason scheme reliability.

SCA data pretreating scheme: attitude data pretreatment is by two stellar camera data fusion placesReason, transforms the attitude of satellite data that generate four element representations, and carries out excluding gross error, level and smooth, finally defeatedGo out level and smooth attitude of satellite data.

3) 1C DBMS pretreatment

This module mainly completes drift correction, sampling, interpolation of data, origin coordinate system transform and time systemThe functions such as conversion, same 1B DBMS is very strong to processing scheme and the load dependence of 1C DBMS, noSame load needs different data processing scheme, for example ACC data pretreating scheme, GNV dataPretreating scheme, KBR data pretreating scheme and SCA data pretreating scheme.

A.SCA data pretreating scheme: mainly operate 1B level by interpolation of data, Detection of Cycle-slip etc.SCA data are converted to 1C level SCA data, and having as 1C level ACC data preprocessing moduleEffect input.

B.ACC data pretreating scheme: mainly will by operations such as interpolation of data, sampling, Coordinate Conversion1B level ACC data are converted to 1C level ACC data, and conduct calibration and gravitational field inverting is effectively defeatedEnter.

C.GNV data pretreating scheme: mainly operate 1B level by Coordinate Conversion, time conversion etc.GNV data are converted to 1C level GNV data, and effective input of conduct calibration and gravitational field inverting.

D.KBR data pretreating scheme: mainly by drift correction, interpolation of data, time system conversionDeng operation, 1B level KBR data are converted to 1C level KBR data, and as gravitational field inverting effectivelyInput.

Data process subsystem major function is: Satellite Orbit Determination, accelerometer calibration and resolve terrestrial gravitation. Processing subsystem is made up of three modules: precise orbit determination module, load calibration module and gravitational field are anti-Drill module, and each module provides multiple different calculation method.

1) precise orbit determination module

Recover high-precision earth gravitational field by Satellite gravity technology and depend on high-precision satellite orbit numberAccording to, therefore, satellite precise orbit determination plays a crucial role to recovering earth gravitational field. In native system, provideThe precise orbit determination of two kinds of modes: geometric method and reduction dynamic method. Geometric method is utilized spaceborne GPS receiver instituteThe pseudorange and the phase observations data that receive position calculating, obtain the position of receiver antenna phase center(being the position of respective satellite), then obtains continuous track by interpolation of data; Reduction dynamic method is abundantUtilize geometry and the dynamic information of satellite, by estimating carrier acceleration random process noise, to powerInformation is done weighting processing with respect to geological information, utilizes procedure parameter to absorb dynamical model mistakePoor.

2) load calibration module

In satellite transit process, the electric physical characteristic of instrument and equipment has determined that instrument and equipment can not be long-termKeep completely normal operation. The scale factor that therefore, can imply a system in accelerometer data is with inclined to one sidePoor, if these data are determined for earth gravitational field, must first calibrate it. This module providesTwo kinds of calibration implementation methods of energy method and acceleration method.

3) gravitational field inverting module

Earth gravitational field has reflected the material space by earth layers interacts and dynamic process determinesDistribute, motion and changing, carried in earth system evolution process that all are relevant with gravitational field mechanism of actionInformation, utilize Satellite Observations can calculate earth gravitational field parameter. Gravitational field inverting has multiple sideMethod: power integration method, short arc value method, energy method and acceleration method, system only provides power long-pending at presentPoint-score, but simultaneously for interface has been reserved in the realization of additive method.

Three grades of production module major functions are: utilize gravitational field inverting module to resolve the earth weight of gainedForce field model calculated gravity anomaly, geoidal height and three kinds of data products of the deviation of plumb line, drill for follow-upShow that subsystem provides effective input.

Demonstration subsystem provides visual flat for gravity satellite simulation data and Gravity Satellite product dataPlatform, has realized the visual control to the each load emulated data of Gravity Satellite. Meanwhile, by setting up the earthVisualization Model, then (comprises Gravity Satellite analog track, substar rail by Gravity Satellite product dataMark, geoidal height, the deviation of plumb line and gravity anomaly etc.) to process, generation can be shown file,Referring to Fig. 3, Fig. 4, and carry out visual presentation on be added to two dimension or the three-dimensional earth.

Claims (5)

1. a low tracking Gravisat Ground Processing System, is characterized in that, comprising:

Platform subsystem, for original emulated data is received and unpacked, and enters data and taskLine pipe reason is distributed, and comprises data receiver subsystem, data administration subsystem, task management subsystem and productProduct distribution subsystem;

Business subsystem, for emulated data is carried out to processing at different levels, comprise data preprocessing subsystem,Data process subsystem and three grades of production subsystems;

Demonstration subsystem, for emulated data is carried out to visual control, carries out visual to data productShow.

2. the low tracking Gravisat of one according to claim 1 Ground Processing System, itsBe characterised in that, in described business subsystem:

Data preprocessing subsystem, for the data of data receiving subsystem output are carried out to pretreatment, rawBecome 1A, 1B, 1C DBMS, and data after treatment are inputed to data process subsystem;

Data process subsystem comprises precise orbit determination module, load calibration module and gravitational field inverting module,The 1B DBMS producing by precise orbit determination module logarithm Data preprocess subsystem carries out precise orbit determination; LogicalCrossing calibration module demarcates 1C DBMS; By gravitational field inverting module, 1C DBMS is carried out to weightField of force inverting, generates gravity field model;

Three grades of production subsystems, enter for the gravity field model data that data process subsystem is generatedRow is processed, and obtains three grades of products of gravity field data, and provides data input for demonstrating subsystem.

3. the low tracking Gravisat of one according to claim 2 Ground Processing System, itsBe characterised in that, three grades of products of described gravity field data comprise that gravity anomaly, geoidal height and vertical line are inclined to one sideDiffer from three kinds of data products.

4. the low tracking Gravisat of one according to claim 2 Ground Processing System, itsBe characterised in that, described data preprocessing subsystem comprises:

1A DBMS pretreatment module, for the treatment of 0 DBMS, model 0 DBMS output quantity withConversion analytic relationship between the observed quantity that data processing needs, then relates in Accurate Calibration analytical relationAnd conversion parameter, finally implement the conversion of all kinds of observed quantities;

1B DBMS pretreatment module, for 1A DBMS is carried out the combination of Correction of Errors, observation,The operations such as breach interpolation, elimination of rough difference;

1C DBMS pretreatment module, for carrying out in drift correction, sampling, data 1B DBMSInsert, the operation such as origin coordinate system transform and time system conversion.

5. the low tracking Gravisat of one according to claim 2 Ground Processing System, itsBe characterised in that:

Described data receiver subsystem, for receiving original emulated data, generates 0 DBMS;

Described data administration subsystem, for realizing data receiver subsystem received data, GRACE1BThe filing management of DBMS and data products at different levels;

Described task management subsystem, for the scheduling to the each data processing module of business subsystem, orderEstablishment, order monitoring;

Described product distribution subsystem, for the distribution function to gravity satellite data product, is demonstration pointThe demonstration that system is carried out satellite simulation data demonstrating and gravity product provides Data support, simultaneously for user carriesFor services such as data query, data download, data subscription, order managements.