Expression and information hierarchical authorization of BDS reference station observation data based on states and residual

Acta Geodaetica et Cartographica Sinica

卷:49

FENG Wei¹  TIAN Yumiao¹  GONG Xiaoying¹  ZHOU Letao¹  YUAN Linguo¹  ZHAO Yinghao¹  HUANG Dingfa¹  ZHANG Xi² 

[1] Department of Surveying and Geo-Informatics, Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China;

[2] First Institute of Surveying and Mapping Engineering, Sichuan Province, Chengdu 610049, China;

关键词: hierarchical authorization;    states;    residual;    data protocol;    satellite-based broadcast;    network rtk;    ppp;   

DOI  :  10.11947/j.AGCS.2020.20190300

来源: DOAJ

【 摘 要 】

BDS reference stations typically store and transmit raw observations directly and make them available to users, which can lead to two disadvantages:first, there is no hierarchical authorization mechanism for users. Any user can solve the precise spatial, time and atmospheric datum information of the reference station through the original observation measurement, which poses a potential threat to the safety of the reference station, second, the strong correlation between the original observation measurement leads to a large amount of data, in BDS receiver observation appears network, uninterrupted, high sampling and multi-band trend, its observation data is a massive explosion, to the data storage and transmission have brought great pressure. Therefore, this paper proposes to use state and residual to express the raw observation data of BDS reference station. Compared with the common data services based on international protocols such as RINEX, Compact RINEX and RTCM, the advantage of this method is that it cannot only provide hierarchical authorization service of datum information for users, technically guarantee the security of data services, but also significantly reduce the amount of transmission data and user-side computation. At the same time, the new expression is equivalent to the original data and does not reduce the accuracy of the final calculation results. This method can be used to establish BDS observation data storage and transmission protocol with independent intellectual property rights, and provide technical support for satellite-based broadcasting services of high-precision data.

【 授权许可】

Unknown