BDS三频模糊度解算及精度检验

BDS Tri-Frequency Ambiguity Resolutionand Accuracy Test

北斗卫星提供3种频率载波信号,极大地推动了利用载波对用户位置和速度信息进行高精度计算方法研究。本文重点研究基于北斗卫星三频信号的载波相位模糊度解算CIR方法,通过使用函数极限的原理推导载波组合,为算法提供了理论基础;分析每一步的误差传递,选取优秀的伪距组合、相位组合,并处理数据验证算法的可行性。在短基线向量前提下,双差中忽略大气延迟的影响,验证了本文提出的几种载波组合的计算模糊度的可行性。

BDS provide tri-frequency carrier singal, greatly promote the use of carrier position and speed information for high accura-cy calculation method research.This article focuses on an advanced tri-frequency signal on the basis of the Beidou satellite carrier Integer ambiguity resolution CIR.Using the principle of limit of a function solves carrier combinations.In the algorithm of the CIR are analysised to calculate error propagation at each step.Then selecting the better combination of pseudorange and phase, confirming its feasibility with the results.And in a short baseline vector, ionospheric effect is ignored in double difference model, to verify the feasi-bility of ambiguity resolution with carrier combination.