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- 2018
BDS/GPS组合精密单点定位精度分析与评价
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Abstract:
精密单点定位（precise point positioning，PPP）已经广泛应用于许多领域，如测绘、交通、导航、地震监测等。近些年来，随着卫星数量的增多，多系统组合呈现越来越明显的趋势。利用全球MGEX（Multi-GNSS Experiment）网数据研究了BDS（BeiDou navigation satellite system）/GPS（global positioning system）组合精密单点定位技术，并与BDS单系统和GPS单系统进行了对比。结果表明，在静态定位中，BDS PPP在E、N、U方向的均方根误差分别为4.35 cm、3.01 cm、6.40 cm；GPS PPP在E、N、U方向的均方根误差分别为1.21 cm、0.48 cm、1.79 cm；BDS/GPS组合PPP在E、N、U方向的均方根误差分别为1.21 cm、0.50 cm、1.87 cm。在动态定位中，BDS PPP外符合精度水平方向优于10 cm，高程方向优于15 cm；GPS PPP和BDS/GPS组合PPP的外符合精度水平方向均优于5 cm，高程方向均优于8 cm。另外，无论是在静态还是动态的PPP中，组合系统相对于单系统，能大大缩短收敛时间，减少定位结果抖动，尤其是相对于BDS PPP来说，优势更为明显
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