多系统融合单频精密单点定位

针对导航定位技术的不断发展及多导航系统的出现,多系统组合定位成为导航定位发展的重要方向。该文采用多模GNSS实验跟踪网多个测站的观测数据,对多系统融合单频精密单点定位的精度进行了分析。结果表明四系统融合单频精密单点定位N方向和E方向偏差的RMS值可达厘米级,均值为7~8cm,要高于单系统和双系统融合定位的精度。在高度角较大时,四系统融合定位仍然可以保持较高精度的连续定位,单GPS系统在高度截止角30°时已无法实现连续定位。另外,多系统动态单频精密单点定位精度受硬件延迟的影响更小。

Precise point positioning with multi-system fusion for single frequency

Aiming at the development of navigation positioning technology and the emergency of multi-system,combined multi-system positioning has become an important trend.This paper does a research on precise point positioning with multi-system integration for single frequency using observation data of several stations from MGEX.According to the results,the RMS value of multi-system integration positioning bias for single frequency can achieve centimeter-level in the north and east direction,and the mean value is about seven to eight centimeters,which is higher compared with single system and double systems.While the cut-off elevation angle is larger,precise point positioning with multi-system integration for single frequency can still keep high-accuracy continuous positioning,but single GPS system can't get continuous positioning when the elevation angle is 30 degrees.Furthermore,the accuracy of kinematic precise point positioning is less affected by hardware delay.