勘察科学技术
勘察科學技術
감찰과학기술
SITE INVESTIGATION SCIENCE AND TECHNOLOGY
2013年
5期
50-52,58
,共4页
李成仁%岳东杰%于双%赵元忆
李成仁%嶽東傑%于雙%趙元憶
리성인%악동걸%우쌍%조원억
GPS/GLONASS%单点定位%定权%自适应因子%方差分量估计
GPS/GLONASS%單點定位%定權%自適應因子%方差分量估計
GPS/GLONASS%단점정위%정권%자괄응인자%방차분량고계
GPS/GLONASS%point positioning%weight determination%adaptive factor%variance compo-nent estimation
GPS/GLONASS组合单点定位需要给定合理的观测值权比，不合理的权比会使最小二乘解失去最小方差性质，导致不合理的单点定位结果。利用单频伪距观测值和广播星历数据，比较不同观测值权比下GPS/GLONASS组合单点定位的结果，实现基于Helmert方差分量估计的定权方法和基于自适应方差分量估计的定权方法。通过实例验证这两种方法均可得到合理的定位结果，且基于自适应方差分量估计的定权方法更具有实时性。
GPS/GLONASS組閤單點定位需要給定閤理的觀測值權比，不閤理的權比會使最小二乘解失去最小方差性質，導緻不閤理的單點定位結果。利用單頻偽距觀測值和廣播星歷數據，比較不同觀測值權比下GPS/GLONASS組閤單點定位的結果，實現基于Helmert方差分量估計的定權方法和基于自適應方差分量估計的定權方法。通過實例驗證這兩種方法均可得到閤理的定位結果，且基于自適應方差分量估計的定權方法更具有實時性。
GPS/GLONASS조합단점정위수요급정합리적관측치권비，불합리적권비회사최소이승해실거최소방차성질，도치불합리적단점정위결과。이용단빈위거관측치화엄파성력수거，비교불동관측치권비하GPS/GLONASS조합단점정위적결과，실현기우Helmert방차분량고계적정권방법화기우자괄응방차분량고계적정권방법。통과실례험증저량충방법균가득도합리적정위결과，차기우자괄응방차분량고계적정권방법경구유실시성。
GPS/GLONASS combination for point positioning need to be given the reasonable weight ratio of observations, the unreasonable weight ratio will cause the least squares solution lose the minimum vari-ance, lead to unreasonable point positioning. Using single-frequency pseudorange observations and the broadcast ephemeris data, it compares the results of GPS/GLONASS combination for point positioning a-mong different observed values weight ratio and realizes weight determination based on Helmert variance component estimation method and adaptive variance component estimation method. Examples show that two methods can both obtain reasonable positioning results, and the weight determination based on adap-tive variance component estimation has more real-time performance.
