阅读说明：本技术 基于p2p技术构建的对等安全卫星高精度增强网络方法 (Peer-to-peer security satellite high-precision network enhancement method constructed based on P2P technology ) 是由 李庆建 王凡 邵璠 范明灿 李慧恩 于 2021-09-22 设计创作，主要内容包括：本发明公开了一种基于P2P技术构建的对等安全卫星高精度增强网络方法,包括以下方案：(1)NRTK服务模式下的单差方案；(2)NRTK服务模式下的非差方案；(3)PPP-RTK服务模式下的技术方案。本发明解决各个单位基准站数据无法共享的瓶颈问题,解决不同单位位置服务的“接边问题”,实现全国“一张网”的基准统一、精度一致的高精度位置服务；本发明实现了全社会高精度定位一体化服务,解决并网服务的数据安全,解决各家数据基准统一,解决了基站建设冗余问题,具有巨大的经济和社会意义。(The invention discloses a peer-to-peer security satellite high-precision network enhancing method constructed based on a P2P technology, which comprises the following scheme: (1) single difference scheme in NRTK service mode; (2) non-bad scheme in NRTK service mode; (3) the technical scheme is under PPP-RTK service mode. The invention solves the bottleneck problem that data of each unit reference station can not be shared, solves the 'edge connecting problem' of different unit position services, and realizes the high-precision position service with uniform reference and consistent precision of 'one network' in China; the invention realizes the high-precision positioning integrated service of the whole society, solves the data safety of the grid-connected service, solves the data standard unification of all families, solves the problem of base station construction redundancy, and has great economic and social significance.)

1. A peer-to-peer security satellite high-precision network enhancing method constructed based on a P2P technology is characterized by comprising the following scheme:

(1) single difference scheme in NRTK service mode: the observation data of the reference station is transmitted to each cooperation unit through a private network, and the cooperation unit broadcasts the single difference data to other cooperation units after forming the differential data through the single difference with the data of the public reference station; each cooperation unit can acquire differential data of all reference stations in the whole network and then form respective differential service products through an NRTK resolving system;

(2) non-bad scenario in NRTK service mode: all technical routes of units are the same; each unit collects the observation data of the reference station to form a non-error correction number, and the non-error correction number is broadcast to other units through the network; the non-error correction numbers of all the reference stations form a uniform differential service product through a fusion system;

(3) the technical scheme under PPP-RTK service mode is as follows: the observation data of the reference station is transmitted to each cooperation unit through a private network; the differential product obtained by each unit through PPP-AR resolving is forwarded to other cooperation units, the differential products of other cooperation units are received at the same time, the differential products and the differential products of the unit are fused together to construct a regional differential correction model, and then the differential correction data needed by the user are broadcasted.

2. The method of claim 1, wherein the single-difference technical solution in NRTK service mode comprises the following steps:

(1) performing standard unified solution on GNSS observation data of all units;

(2) after receiving the GNSS observation data, each unit makes single difference with the public reference station data to form differential data, and sends the single difference data to other cooperation units.

(3) After each unit collects the single difference data of the base stations of the cooperative units from different sources, all the single difference data are uniformly subjected to NRTK resolving;

(4) the NRTK resolving module reasonably weights single difference data from different sources according to data quality, and double difference observation data are formed for resolving;

(5) and performing regional modeling based on the solved data to construct virtual grid point VRS data.

3. The peer-to-peer security satellite high-precision network enhancing method based on the P2P technology as claimed in claim 2, wherein the step (4) is specifically:

(4.1) carrying out precision evaluation on the single difference data according to the data quality of the reference station;

(4.2) carrying out weight matching on the single difference data according to the precision evaluation result;

and (4.3) establishing a double-difference observation equation for the weighted single-difference data, and calculating the NRTK error.

4. The method of claim 1, wherein the non-poor technical solution in NRTK service mode comprises the following steps:

(1) the space-time reference of the cooperative unit base station is unified;

(2) selecting a cooperation unit difference product in a designated area, and reasonably selecting base stations participating in resolving according to the distribution of cooperation unit base stations in the designated area and real-time data quality conditions;

(3) networking the base stations and calculating a base line to obtain a base line double-difference ambiguity;

(4) selecting the non-differential ambiguity of a certain base station and a certain satellite as a reference, restoring the non-differential ambiguity of all the satellites of all the base stations, and simultaneously obtaining the non-differential error correction number of each station;

(5) distributing the non-error correction numbers of all the sites to other cooperation units, receiving the non-error correction numbers from other cooperation units, reasonably weighting the non-error correction numbers of all the sites and uniformly performing adjustment processing;

(6) and uniformly modeling the non-difference correction numbers of all the sites obtained after adjustment to construct virtual grid point VRS data.

5. The peer-to-peer security satellite high-precision enhanced network method based on P2P technology as claimed in claim 1, wherein the technical solution in PPP-RTK service mode includes the following steps:

(1) each cooperation unit sends the GNSS observation data to a local data access system in real time;

(2) the data access system of each cooperation unit processes the GNSS observation data to form a fixed orbit equation without position parameters; then sending the data to data access systems of other cooperation units, wherein each cooperation unit uses all shared orbit determination equations to carry out combined precise orbit calculation to obtain precise orbit results respectively;

(3) the data access system of each cooperation unit uses the precise orbit data to process the GNSS observation data to form a fixed clock equation without position parameters; then sending the data to data access systems of other cooperation units, wherein each cooperation unit uses all shared fixed clock equations to carry out combined precision clock error calculation to respectively obtain precision clock error results;

(4) the data access system of each cooperation unit uses the precision orbit precision clock error data to process the GNSS observation data and respectively carries out UPD calculation; then, the UPD resolving result is sent to data access systems of other cooperation units, and all the cooperation units use all the shared UPD results to carry out adjustment processing to obtain final UPD results respectively;

(5) the data access system of each cooperation unit uses the precision orbit precision clock error and the UPD data to process the GNSS observation data and respectively carries out troposphere and ionosphere calculation; and then, transmitting the troposphere and ionosphere results and the rough position of the cooperative unit to a data access system of other cooperative units, and performing unified modeling calculation on the troposphere and the ionosphere by each cooperative unit to obtain a final atmosphere modeling result respectively.

6. A peer-to-peer security satellite high-precision enhanced network system constructed based on P2P technology is characterized by comprising the following modules:

a data acquisition module: the main functions are acquisition of observation data of a reference station and receiving differential data from other cooperation units;

a standard unifying module: the reference unification of all the reference stations is realized;

a resolving module: calculating a differential correction number based on the observation data;

the differential broadcasting module: broadcasting VRS to users and differential correction numbers to cooperation mechanism;

a format specification module: and checking the format of the data to be broadcasted to ensure that the broadcasted data is not confidential.

7. A computer storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the peer-to-peer security satellite high-precision enhanced network method constructed based on the P2P technology according to any one of claims 1-5.

8. A computer device comprising a storage, a processor and a computer program stored on the storage and executable on the reprocessor, wherein the processor when executing the computer program implements the peer-to-peer security satellite high-precision enhanced network method constructed based on the P2P technology according to any one of claims 1-5.

Technical Field

The invention relates to a satellite system, in particular to a peer-to-peer security satellite high-precision network enhancing method constructed based on the P2P technology.

Background

(1) Background of satellite differential technology

The construction technology of the continuous operation reference station of the global navigation satellite system is gradually developed and matured, and related industrial standards and national standards are also published domestically. Currently, most provincial GNSS (global navigation satellite system) continuous operation reference station networks of provinces, cities and autonomous regions in China are built and widely applied to various industries. The GNSS continuous operation reference station network organically combines a GNSS technology, a computer technology, a network information technology, a database, high-precision data processing and a geographic information system, integrates various devices and networks, and forms a whole comprising a reference station infrastructure, a data transmission network, a data center and a user service system.

(2) Base station location policy and data security context

According to the clear regulations of the surveying and mapping laws of the people's republic of China, for constructing a satellite navigation positioning reference station, a construction unit shall report to a national service institute to survey and map geographic information governing department or province, autonomous region and direct municipality government to record geographic information governing department according to the relevant regulations of the country. The administrative department of the geographic information of the survey and drawing of the state department shall summarize the construction and record condition of the national satellite navigation positioning reference station and regularly notify the military survey and drawing department. The satellite navigation positioning reference station is a ground fixed observation station which continuously observes satellite navigation signals for a long time and transmits observation data to a data center in real time or at regular time through communication facilities.

(3) The prior art has the following disadvantages:

the CORS systems built by the system are independently applied and cannot cover the whole country; data security and policy, the CORS base station data can not be provided externally; all CORS system base stations cannot be unified to form a national unified standard; the grid connection can not be completed, a nationwide unified network is formed, and a unified broadcasting service is formed.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to provide a peer-to-peer security satellite high-precision enhanced network system constructed based on a P2P technology, so that the bottleneck problem that data of satellite navigation positioning reference stations of all units cannot be shared is solved.

The technical scheme is as follows: the invention discloses a peer-to-peer security satellite high-precision network enhancing method based on a P2P technology, which comprises the following scheme:

(1) single difference scheme in NRTK service mode: the observation data of the reference station is transmitted to each cooperation unit through a private network, and the cooperation unit broadcasts the single difference data to other cooperation units after forming the differential data through the single difference with the data of the public reference station; each cooperation unit can acquire differential data of all reference stations in the whole network and then form respective differential service products through an NRTK resolving system;

(2) non-bad scenario in NRTK service mode: all technical routes of units are the same; each unit collects the observation data of the reference station to form a non-error correction number, and the non-error correction number is broadcast to other units through the network; the non-error correction numbers of all the reference stations form a uniform differential service product through a fusion system;

(3) the technical scheme under PPP-RTK service mode is as follows: the observation data of the reference station is transmitted to each cooperation unit through a private network; the differential product obtained by each unit through PPP-AR resolving is forwarded to other cooperation units, the differential products of other cooperation units are received at the same time, the differential products and the differential products of the unit are fused together to construct a regional differential correction model, and then the differential correction data needed by the user are broadcasted.

The single difference technical scheme under the NRTK service mode comprises the following steps:

(1) the GNSS observation data of all units are synchronously resolved by adopting a unified model and a consistent data processing strategy to obtain coordinate results under national reference, and the frames of all reference stations are unified, so that the problem of deviation caused by the inconsistency of the coordinate frames of the reference stations of different units is solved.

(2) After each unit receives the GNSS real-time data stream, the GNSS real-time data stream and the public reference station data are subjected to single difference to form differential data, and the single difference data are sent to other cooperation units, so that the problem that the real-time observation data of the reference station cannot be shared due to secret interference is solved.

(3) Each unit can collect single difference data of base stations of cooperative units from different sources, and all the single difference data are subjected to NRTK calculation uniformly, so that high-precision position service with one network and consistent precision in the whole country is realized.

(4) The NRTK resolving module reasonably weights single difference data from different sources according to data quality, and double difference observation data are formed to be resolved.

(5) And performing regional modeling based on the solved data to construct virtual grid point VRS data.

The step (4) is specifically as follows:

(4.1) carrying out precision evaluation on the single difference data according to the data quality of the reference station, wherein the accurate precision is the basis of weighting;

(4.2) according to the precision evaluation result, carrying out weight matching on the single difference data, giving higher weight to the data with good quality, and giving lower weight to the data with poor quality, thereby fully utilizing the high-quality observation data and effectively reducing the effect of the low-quality observation data;

and (4.3) establishing a double-difference observation equation based on the single-difference data according to the determined weight, and carrying out NRTK error calculation.

The non-poor technical scheme in the NRTK service mode comprises the following steps:

(1) and all the reference stations of each cooperation unit acquire coordinate results under unified reference through unified high-precision data processing.

(2) After each cooperative unit receives the real-time observation data stream of the reference station, networking through the base station and carrying out baseline resolution to obtain baseline double-difference ambiguity;

(3) selecting the non-differential ambiguity of a certain base station and a certain satellite as a reference, recovering the non-differential ambiguity of all the satellites of all the base stations, and simultaneously obtaining the non-differential error correction number of each station;

(4) the error correction count for each station is sent to other cooperating units, while the error correction count for each station is received from other cooperating units.

(5) And reasonably weighting the correction numbers of the non-error errors of all the stations and uniformly carrying out adjustment processing, firstly carrying out precision evaluation on the single-error data according to the data quality of the reference station, then carrying out weight determination on the single-error data according to the precision evaluation result, building a double-error observation equation according to the weight determination result, and carrying out NRTK resolving.

(6) And uniformly modeling the non-difference correction numbers of all the sites obtained after adjustment to construct virtual grid point VRS data.

The technical scheme under the PPP-RTK service mode comprises the following steps:

(1) each cooperation unit sends the GNSS observation data to a local data access system in real time;

(2) the data access system of each cooperation unit processes the GNSS observation data to form a fixed orbit equation without position parameters; then sending the data to data access systems of other cooperation units, wherein each cooperation unit uses all shared orbit determination equations to carry out combined precise orbit calculation to obtain precise orbit results respectively; therefore, the precise tracks determined by all cooperation units are ensured to be consistent, and the frames of all reference stations are also ensured to be consistent.

(3) The data access system of each cooperation unit processes the GNSS observation data according to the precise orbit to form a fixed clock equation without position parameters; then sending the data to data access systems of other cooperation units, wherein each cooperation unit uses all shared fixed clock equations to carry out combined precision clock error calculation to respectively obtain precision clock error results;

(4) the data access system of each cooperation unit uses the precision orbit precision clock error data to process the GNSS observation data and respectively carries out UPD calculation; then, the UPD resolving result is sent to data access systems of other cooperation units, and all the cooperation units use all the shared UPD results to carry out adjustment processing to obtain final UPD results respectively;

(5) the data access system of each cooperation unit uses the precision orbit precision clock error and the UPD data to process the GNSS observation data and respectively carries out troposphere and ionosphere calculation; and then, transmitting the troposphere and ionosphere results and the probability position of the troposphere and ionosphere results to other cooperative units to access the system, and performing unified modeling calculation on the troposphere and ionosphere by each cooperative unit to obtain the final atmosphere modeling result respectively.

A peer-to-peer security satellite high-precision enhanced network system constructed based on P2P technology comprises the following modules:

a data acquisition module: the main functions are acquisition of observation data of a reference station and receiving differential data from other cooperation units;

a standard unifying module: the reference unification of all the reference stations is realized;

a resolving module: calculating a differential correction number based on the observation data;

the differential broadcasting module: broadcasting VRS to users and differential correction numbers to cooperation mechanism;

a format specification module: and checking the format of the data to be broadcasted to ensure that the broadcasted data is not confidential.

A computer storage medium having stored thereon a computer program which, when executed by a processor, implements the peer-to-peer secure satellite high accuracy augmentation network system constructed based on the P2P technique described above.

A computer device comprising a storage, a processor and a computer program stored on the storage and executable on the reprocessor, the processor implementing the peer-to-peer security satellite high precision enhanced network system constructed based on the P2P technology when executing the computer program.

Has the advantages that: compared with the prior art, the invention has the following advantages: (1) the bottleneck problem that data of each unit reference station cannot be shared is solved, the 'edge connecting problem' of different unit position services is solved, and high-precision position services with unified reference and consistent precision of 'one network' in China are realized; (2) the method realizes the high-precision positioning integrated service of the whole society, solves the data safety of the grid-connected service, solves the problem of unified data reference of each family, solves the problem of base station construction redundancy, and has great economic and social significance.

Drawings

FIG. 1 is a technical roadmap for the present invention;

FIG. 2 is a flow chart of a single difference scheme in NRTK service mode of the present invention;

FIG. 3 is a flow chart of a non-poor scheme in NRTK service mode of the present invention;

fig. 4 is a flowchart in the PPP-RTK service mode of the present invention.

Detailed Description

The technical scheme of the invention is further explained by combining the attached drawings.

As shown in fig. 1, the peer-to-peer security satellite high-precision enhanced network method constructed based on the P2P technology includes the following steps:

(1) single difference scheme in NRTK service mode: the observation data of the reference station is transmitted to each cooperation unit through a private network, and the cooperation unit broadcasts the single difference data to other cooperation units after forming the differential data through the single difference with the data of the public reference station; each cooperation unit can acquire differential data of all reference stations in the whole network and then form respective differential service products through an NRTK resolving system;

(2) non-bad scenario in NRTK service mode: all technical routes of units are the same; each unit collects the observation data of the reference station to form a non-error correction number, and the non-error correction number is broadcast to other units through the network; the non-error correction numbers of all the reference stations form a uniform differential service product through a fusion system;

(3) the technical scheme under PPP-RTK service mode is as follows: the observation data of the reference station is transmitted to each cooperation unit through a private network; the differential product obtained by each unit through PPP-AR resolving is forwarded to other cooperation units, the differential products of other cooperation units are received at the same time, the differential products and the differential products of the unit are fused together to construct a regional differential correction model, and then the differential correction data needed by the user are broadcasted.

As shown in fig. 2, the single difference solution in the NRTK service mode includes the following steps:

(1) and all the reference stations of the cooperation unit obtain the coordinate result under the unified reference through unified resolving.

(2) After each unit receives the GNSS real-time observation data, the GNSS real-time observation data and the public reference station data are subjected to single difference to form differential data, and the single difference data are sent to other cooperation units.

Taking two reference stations m, n as an example, the inter-station single difference observed value of the common-view satellite s between two stations is:

wherein the content of the first and second substances,for the corrected single-difference carrier phase and pseudo-range observed value between stations of the mathematical model,is the interstation single difference geometric distance correlation term, c is the signal propagation velocity, deltat_m、δt_nIs the difference in the receiver clocks of the two stations,single difference tropospheric and ionospheric errors between stations.

(3) Collecting single difference data of cooperative units from different sources, and entering an NRTK resolving module;

(4) and according to the data quality of the reference station, performing precision evaluation on the single difference data so as to weight the single difference data. And giving higher weight to the data with good quality, giving low weight to the data with poor quality, establishing a double-difference observation equation for the single-difference data after weighting, and calculating the NRTK.

(5) And carrying out regional modeling on the solved data to construct virtual grid point VRS data.

As shown in fig. 3, the non-poor technical solution in the NRTK service mode includes the following steps:

(1) and (4) obtaining the coordinate result under the national framework by uniformly processing the observation data of all the reference stations of the cooperation unit through high-precision data.

(2) After each cooperative unit receives the real-time observation data stream of the reference station, networking through the base station and carrying out baseline resolution to obtain baseline double-difference ambiguity;

(3) selecting the non-differential ambiguity of a certain base station and a certain satellite as a reference, recovering the non-differential ambiguity of all the satellites of all the base stations, and simultaneously obtaining the non-differential error correction number of each station;

(4) the error correction count for each station is sent to other cooperating units, while the error correction count for each station is received from other cooperating units.

(5) And reasonably weighting the correction numbers of the non-error errors of all the stations and uniformly carrying out adjustment processing, firstly carrying out precision evaluation on the single-error data according to the data quality of the reference station, then carrying out weight determination on the single-error data according to the precision evaluation result, building a double-error observation equation according to the weight determination result, and carrying out NRTK resolving.

(6) And uniformly modeling the non-difference correction numbers of all the sites obtained after adjustment to construct virtual grid point VRS data.

As shown in fig. 4, the technical solution in the PPP-RTK service mode includes the following steps:

(1) each base station sends GNSS observation data to a local data access system in real time;

(2) the data access system of each base station processes the GNSS observation data to form a fixed orbit equation without position parameters; then sending the precise orbit calculation result to a comprehensive calculation platform, using the orbit determination equation of each station by the comprehensive calculation platform to carry out combined precise orbit calculation, and returning the precise orbit result to each station;

(3) the data access system of each base station uses the precise orbit data to process the GNSS observation data to form a fixed clock equation without position parameters; then sending the clock signals to a comprehensive resolving platform, using the fixed clock equation of each station by the comprehensive resolving platform to perform combined precision clock error resolving, and returning the precision clock error results to each station;

(4) the data access system of each base station uses the precision orbit precision clock error data to process the GNSS observation data and respectively carries out UPD calculation; then, the UPD calculation result is sent to a comprehensive calculation platform, the comprehensive calculation platform uniformly performs adjustment processing on the UPD result of each station, and the final result is returned to each station;

(5) the data access system of each base station uses the precision orbit precision clock error and the UPD data to process the GNSS observation data and respectively carry out troposphere and ionosphere solution; and then the troposphere and ionosphere results and the rough positions of the troposphere and ionosphere results are sent to a comprehensive resolving platform, the platform carries out unified modeling on the troposphere and ionosphere, and the final results are returned to all the sites.

A peer-to-peer security satellite high-precision enhanced network system constructed based on P2P technology comprises the following modules:

a data acquisition module: the main functions are acquisition of observation data of a reference station and receiving differential data from other cooperation units;

a standard unifying module: the reference unification of all the reference stations is realized;

a resolving module: calculating a differential correction number based on the observation data;

the differential broadcasting module: broadcasting VRS to users and differential correction numbers to cooperation mechanism;

a format specification module: and checking the format of the data to be broadcasted to ensure that the broadcasted data is not confidential.

A computer storage medium having stored thereon a computer program which, when executed by a processor, implements the peer-to-peer secure satellite high accuracy augmentation network system constructed based on the P2P technique described above.

A computer device comprising a storage, a processor and a computer program stored on the storage and executable on the reprocessor, the processor implementing the peer-to-peer security satellite high precision enhanced network system constructed based on the P2P technology when executing the computer program.