| GAMIT10.71解算GNSS长基线精度分析 |
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| 引用本文： | 慕仁海,常春涛,党亚民,成英燕.GAMIT10.71解算GNSS长基线精度分析[J].全球定位系统,2020,45(5):14-19. |
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| 作者姓名： | 慕仁海 常春涛 党亚民 成英燕 |
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| 作者单位： | 中国测绘科学研究院 ,北京100830;中国测绘科学研究院 ,北京100830;中国测绘科学研究院 ,北京100830;中国测绘科学研究院 ,北京100830 |
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| 摘 要： | GAMIT／GLOBK已于2020年3月9日发布10.71最新版本,主要新增了北斗三号（BDS-3）数据处理和太阳光压模型等方面的内容．本文利用GAMIT10.71软件,结合旧版本(GAMIT10.7_2019／09／14),对全球35个MGEX(Multi-GNSS Experiment)跟踪站2020年第51-60天共10天的全球卫星导航系统（GNSS）数据进行处理,并从标准化均方根误差(NRMS)、基线重复率、基线长度标准差、基线解算精度及点位精度等四个方面对GPS和北斗卫星导航系统（BDS）解算结果进行对比分析．实验结果表明:各解算方案NRMS值都能达到0.22以内的精度;GPS基线重复率略优于BDS,新旧版本对长基线的相对基线重复率和绝对基线重复率精度都分别能达到1×10-9和1×10-2;新版基线长度解算精度与多日解平差结果略优于旧版,多日解平差结果GPS精度略优于BDS;总体来说,新版GAMIT软件表现效果较好,但针对单BDS系统解算精度而言,还有许多问题值得探讨．
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| 关 键 词： | GAMIT10.71 BDS GPS 长基线解算 |
GAMIT 10.71 resolution GNSS long baseline precision analysis |
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| Institution: | Chinese Academy of Surveying and Mapping,Beijing 100830,China |
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| Abstract: | GAMIT／GLOBK has released the latest version of 10.71 on March 9,2020,mainly adding BDS-3 data processing and solar pressure model.This article uses GAMIT10.71 software,combined with the old version (GAMIT10.7_2019／09／14),to process the GNSS data of 35 MGEX (Multi-GNSS Experiment) tracking stations on the 51st to 60th days of 2020 in the world. The square root error(NRMS),baseline repetition rate,baseline mean square error,baseline solution accuracy and point accuracy are compared and analyzed for GPS and BDS solution results.The experimental results show that the root-mean-square error of each solution can reach an accuracy of less than 0.22;the GPS baseline repetition rate is slightly better than BDS.The relative and absolute baseline repetition rates of the old and new versions of the long baseline are both accurate which can achieve 1×10-9 and 1×10-2 respectively;the new version of the baseline length calculation accuracy and the adjustment result of many days are slightly better than the old version,and the adjustment result of many days GPS accuracy is slightly better than BDS;Overall test shows that the new version of GAMIT software has a better performance.But for the accuracy of the single BDS system,there are still many problems worth discussing. |
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