基于P1-C1接收机差分码偏差短期时变特性分析

Analysis of Short-term Variations of Receiver Differential Code Bias Based on P1-C1

基于频内(P1-C1)差分码偏差的测码组合解算不依赖电离层的优势,本文基于零基准分离站星综合差分码之和的方法对15个IGS观测站接收机差分码偏差进行解算,分析各测站接收机差分码偏差在1个月内的时变特性.实验数据处理结果表明,除KIR8站、ONS1站外,其余13测站接收机差分码偏差1个月内随时间的变化呈现出较优的稳定性.同时,本文以CODE发布值为参考分析各接收机差分码偏差确定值的精度,GPS接收机差分码偏差精度可达0.009ns、GLONASS接收机差分码偏差精度可达0.015 ns,分析结果表明本文确定接收机(P1-C1)差分码偏差的方法具有较高的精度和可靠性.

Base on the advantages of solution of the intra-frequency( P1-C1) differential code bias that does not depended on ionosphere,this paper estimates the DCBs of 15 IGS station receivers by separating the SPR based on zero reference and analyzes the time-varying characteristics of DCBs within the period of one month. The results of the experimental data processing show that,except for KIR8 station and ONS1 station,the DCBs of the remaining 13 station receivers show a good stability in one month. At the same time,this paper uses the CODE release value to analyze the accuracy of DCB receiver. The accuracy of GPS receiver DCB can reach 0. 009 ns and that of GLONASS can reach 0. 015 ns. The results of the data analysis show that the method of determining the receiver DCB has a higher accuracy and reliability.