基于数理统计方法搜索GPS所有异步环

Searching for all GPS non-simultaneous observation loops based on mathematical statistics

异步环是GPS基线质量检查的重要内容,以便于发现解算粗差,评估GPS平差的质量及精度。利用数理统计的方法,通过GPS测站点在不同时段的重复情况,利用重复点作为异步环搜索的起始点,利用树形搜索的方法判断重复点之间能否构成异步环,在此基础上从GPS基线向量中抓取基线组成异步环,可以快速、无遗漏地搜索出所有的异步环。通过实例验证,取得了很好的效果。

Non‐simultaneous observation loop serves as an important part of GPS baseline quality checks in order to find solver gross error ,and assess the quality and accuracy of GPS adjustment .In this paper ,first it finds duplicate GPS observation sites from different times ,then uses these points as the index points ,and these index points using a tree search algorithm can search all of the GPS observation points w hich compose non‐simultaneous observation loops .Finally ,it selects the baselines from the GPS baseline vector to compose the non‐simultaneous observation loop .The method used in this paper is verified with examples ,and achieves good results .