In order to solve the problems of insufficient sharing, independence and non-uniform platform of satellite precision positioning services in the fields of natural resources in Shaanxi, Gansu, Ningxia and Shanxi, based on the resources of satellite navigation and positioning reference stations in those four provinces of Shaanxi, Gansu, Ningxia and Shanxi, this study proposes a system architecture of “one network, multi-center and one platform” is proposed. On the premise of not changing the existing computing and broadcasting services in each province, by studying the dynamic differential scheduling algorithm model, the cross-regional seamless non-inductive roaming technology is developed, and the BeiDou high-precision cross-regional positioning service “one network” system is constructed to realize the cross-regional automatic scheduling of high-precision positioning. The results show that the internal coincidence accuracy of network RTK fixed-point test at the junction of Shaanxi, Gansu, Ningxia and Shanxi Provinces is better than 1 cm in North, East and Up directions, and the external coincidence accuracy is better than 3 cm, 2 cm and 5 cm in North, East and Up directions, respectively. The fixed rate of vehicle dynamic positioning in difficult environment is better than 64 %, the dynamic account association delay is better than 78 ms, the fixed rate in general environment is better than 75 %, and the dynamic account association delay is better than 47 ms. The inter-provincial dynamic positioning service switching is smooth, and the average delay is less than 50 ms, which can meet the high-precision positioning service requirements of most users. The research conclusions provide a technical reference for the construction of a national BeiDou high-precision positioning service ' one network ' in the field of natural resources.
陕甘宁晋北斗高精度跨区域定位服务系统的关键是“一平台”,陕甘宁晋高精度定位服务云平台结构见图2。该平台设计充分利用陕甘宁晋区域内的既有CORS系统及数据资源,通过将数据解算与业务服务分离,构建具备跨省服务能力的高精度定位服务云平台,提供统一的用户服务与数据管理。用户通过统一入口进行服务注册,并使用云平台分配的定位账号访问统一的播发网关IP和端口,在服务层实现跨省协同服务与无缝漫游,统一采用2000国家大地坐标系(China geodetic coordinate system 2000,CGCS2000)。该设计在保持各区域原有基准站数据解算系统不变的前提下,仍将数据计算与处理部署于专网环境。各生成的伪距差分和载波相位差分改正信息,经安全防护改造后传输至云端业务系统,统一在云平台中进行调度与播发,从而在服务层面实现跨省协同服务与无缝漫游。
YANGYuanxi. Digital twin and spatio-temporal intelligence of geospatial information system[J]. Acta Geodaetica et Cartographica Sinica, 2025, 54(2): 213-220.
YANGYuanxi, MINGFeng. Current status and future development of spatiotemporal datum construction in China[J]. Scientia Sinica (Terrae), 2023, 53(9): 2192-2195.
JIANGWeiping. Challenges and opportunities of GNSS reference station network[J]. Acta Geodaetica et Cartographica Sinica, 2017, 46(10): 1379-1388.
[7]
VÁZQUEZ-ONTIVEROSJ R, PADILLA-VELAZCOJ, GAXIOLA-CAMACHOJ R, et al. Evaluation and analysis of the accuracy of open-source software and online services for PPP processing in static mode[J]. Remote Sensing, 2023, 15(8): 2034.
[8]
ZHUS L, YUED J, HEL N, et al. Modeling and performance assessment of BDS-2/BDS-3 triple-frequency ionosphere-free and uncombined precise point positioning[J]. Measurement, 2021, 180: 109564.
[9]
LIX P, PANL. Precise point positioning with almost fully deployed BDS-3, BDS-2, GPS, GLONASS, Galileo and QZSS using precise products from different analysis centers[J]. Remote Sensing, 2021, 13(19): 3905.
[10]
LIY, ZHANGZ T, HEX F, et al. Realistic stochastic modeling considering the PDOP and its application in real-time GNSS point positioning under challenging environments[J]. Measurement, 2022, 197: 111342.
ZHANGJunhua, WANGYoukun, DINGRenjun, et al. Construction and evaluation of KMCORS monitoring system[J]. Geotechnical Investigation & Surveying, 2025, 53(2): 51-54, 84.
TANGTao, YAOYibin, CHURuitao, et al. A non-parametric real-time coordinate transformation method applicable to CORS[J]. Journal of Geomatics, 2024, 49(5): 14-18.
LIZhicai, ZHANGPeng, ZHENGFu, et al. The study on ground-based augmentation grid model based on BEIDOU navigation system[J]. Geomatics World, 2017, 24(2): 68-72.
WUJunli, CHENMing, WANGXiaoqing. Design and realization of the national wide area real time precise positioning service system[J]. Geomatics World, 2018, 25(1): 47-49, 54.
CHENHao, SUNXiaochao, TANGXiaofei, et al. Research and implementation of provincial CORS collaborative service technology[J]. Geospatial Information, 2020, 18(7): 63-65, 7.
DONGMingxu, CHUBin, CHENChunhua, et al. A cloud platform construction method of high precision location service based on CORS[J]. Science of Surveying and Mapping, 2018, 43(7): 164-169.
SHENZhengzhong, FENGYangmin, HUZhengwei, et al. Design and application of cross-regional BDS service model in the Yangtze River Delta[J]. Bulletin of Surveying and Mapping, 2023(2): 124-127, 149.
FENGYantong, ZHOUZiyue. Design and implementation of WebGIS-based CORS network service and management system[J]. Journal of Shandong University of Technology (Natural Science Edition), 2015, 29(6): 16-19.
TANGXiaofei, CHEYiming, SUNXiaochao, et al. Design and implementation of BDS one network business management and service system[J]. Bulletin of Surveying and Mapping, 2020(1): 142-145.
TANMingjian, ZHANGXi, SHIXin. Technological implementation of distributed CORS resource collaborative service[J]. Journal of Navigation and Positioning, 2019, 7(2): 118-123.
ZHANGJingjing, HUKe, CHENXianchun, et al. Implementation of seamless switching communication model for BDS high precision CORS cross-network service[J]. Bulletin of Surveying and Mapping, 2019(4): 17-20, 31.
SHIChuang, ZHENGFu, LOUYidong. Research and evaluation of BDS real-time wide-area precise positioning service system[J]. Acta Geodaetica et Cartographica Sinica, 2017, 46(10): 1354-1363.
LIUHui, SHIXiaoyan, YANGZhanji, et al. The establishment and experiments of Shenzhen continuous operational reference system[J]. Bulletin of Surveying and Mapping, 2003(9): 33-36.