GPS双频相位平滑伪距在卫星预报钟差精度评定中的应用.PDFVIP

30 2 No .2 Vol .3 0 2 0 0 8 6 　Journal of Earth Sciences and Environment 　 Jun.2 0 0 8 GPS 1 2 1 路晓峰 , 贾小林 , 杨志强 (1. , 71005 ;2. , 71005 ) :Hatch , Hatch 。 , 。 :, 。 1 ns(1σ), 。 :Hatch ;;;;; :P228 　:A　:1672-6561(2008)02-0209-05 Application of GPS Dual Frequencies Phase-Smoothed Pseudo-Range Data in Accuracy Evaluation of Satellite Clock Error of Broadcast Ephemeris 1 2 1 LU Xiao-feng , JIA Xiao-lin , YANG Zhi-qiang (1.School of Geological E ngineering and Survey ing, Chang an University , X i an 71005 , Shaanxi, China; 2.X i an Research Institute of Survey ing and Mapping, X i an 71005 , Shaanxi, China) A stract:The carrier smoothed pseudo-range is briefly discussed, and a w eighting method is developed for H atch- type filter.Based on this modified H atch-type filter and precise ephemeris, the accuracy evaluation of satellite clock bias of broadcast ephemeris using GPS dual frequencies phase-smoothed pseudo-range is researched.By comparison and anaysis, the following facts are draw n:it improves the precision of pseudo-range using phase smoothing pseudo-range, and improves the precision of satellite clock bias w hen the clock bias is calculated by using pseudo-ranges data;the precision of satellite clock bias is better than 1 ns(1σ), when the clock bias is calculated by using GPS dual frequencies phase-smoothed pseudo-range data;there is no systematic error betw een this research and IGS s clock bias. Key words:Hatch-type filter;carrier phase smoothed pseudo-range;iono-free combination;broadcast ephemeris;