低成本U-blox模块的单频GPS/BDS增强PPP定位性能分析

Single Frequency GPS/BDS Enhanced PPP Positioning Performance Analysis of Low Cost U-blox Module

以U-blox单频接收机采集数据,在GPS与GPS/BDS两种解算模式下进行局域增强精密单点定位(PPP)解算,并进行模糊度固定,对其在不同环境下的定位性能进行实验研究和分析。实验结果表明:在静态环境下,GPS/BDS浮点解收敛至cm级需3min左右,较GPS缩短64%,GPS/BDS定位精度RMS在平面与高程方向分别为(3.2cm,2.7cm),较GPS提升(47%,59%);GPS/BDS在30s左右可固定模糊度,固定后定位精度为(0.4cm,1.0cm),较GPS/BDS浮点解提升(88%,63%)。在动态环境下,GPS/BDS浮点解收敛至cm级需4min左右,较GPS提升59%,定位精度为(3.1cm,5.9cm),较GPS提升(34%,43%);GPS/BDS获得固定解需2min左右,固定后定位精度为(0.7cm,1.0cm),较GPS/BDS浮点解提升(77%,83%)。

Ublox single-frequency receiver is used to collect data and then the performance of single-frequency PPP based on reference-station correction is analyzed in GPS and GPS/BDS solution modes with ambiguity fixed,experimental study and analysis of its positioning performance in different environments are carried out.The static results reveal that the GPS/BDS takes about 3 minutes to converge to the centimeter level,which is improved 64%than the GPS,the positioning accuracy RMS is(3.2 cm,2.7 cm)in the plane and elevation directions,which is improved(47%,59%).GPS/BDS can fix the ambiguity around 30 sand the positioning accuracy is(0.4 cm,1.0 cm)which is improved(88%,63%)than the GPS/BDS float solution.The dynamic results reveal that the GPS/BDS takes about 3 minutes to converge and improved 59%than the GPS,the positioning accuracy is(3.1 cm,5.9 cm)which is improved(47%,59%).GPS/BDS can fix the ambiguity around 2 min and the positioning accuracy is(0.7 cm,1.0 cm)which is improved(77%,83%)than the GPS/BDS float solution.