Distribution of Reference Stations:Initial Explore on the Optimal Selection Strategy  

作　　者：BAO Junjie LI Rui SHAO Bo HUANG Zhigang 

机构地区：[1]School of Electronic and Information Engineering,Beihang University,Beijing 100191,China [2]The 20th Research Institute of China Electronics Technology Group Corporation,Xi’an 710000,China

出　　处：《Chinese Journal of Electronics》2021年第4期752-758,共7页电子学报（英文版）

基　　金：supported by the National National Key Research and Development Program of China(No.2020YFB05056027)。

摘　　要：The Satellite-based augmentation system(SBAS)is intended to provide real-time differential global navigation satellite system corrections with the high accuracy,availability,and integrity required for aviation applications.Since the performance of Satellite clock and ephemeris(SCE)corrections and Ionospheric range delay(IRD)corrections can vary dramatically depending on satellites and Ground reference stations(GRSs)geometry,therefore,we present a GRSs distribution optimized criteria and process to improve SBAS corrections performance.The present step-by-step optimized scheme using the average satellite surveillance dilution of precision and relative centroid metric availability of grid points as fitness values to determine the appropriate GRSs distribution to sufficiently meet the corrections requirements.The results show that the statistical mean RCM availability can reach more than 0.5518 for all IGPs and the coverage depth of GRSs in China and its surrounding areas is more than 25,which fully satisfies the requirement for solving SCE and IRD corrections.

关 键 词：Ground reference stations distribution Satellite surveillance dilution of precision Relative centroid metric Clock and ephemeris corrections Ionospheric corrections 

分 类 号：TN967.1[电子电信—信号与信息处理]