摘要
本文利用实际飞行的航空动态数据,以传统差分GPS解算结果作为参考,分析了GPS/GLONASS组合精密单点定位在航空动态测量中的应用。试验结果表明,当GPS观测卫星数较多(大于6颗)时,GPS/GLONASS组合对提高定位精度不明显,但可提高定位的可靠性,获得较小的PDOP值;当GPS观测卫星数少于4颗时,采用GPS/GLONASS组合系统仍可获得厘米级的定位结果,保证了动态测量的连续性。
Abstract. The mathematical model of Precise Point Positioning （PPP） based on the GPS /GLONASS combined system was introduced in the paper. Taking the traditional dif{erential GPS result as a reference, the application of PPP based on the GPS/GLONASS combined system in aerial kinematic measurement was analyzed using one set of actual flight data. The experimental results showed that using GPS/GLONASS combination system to improve the positioning accuracy is not obvious when the number of GPS observa tion satellites is more than 6, but the positioning reliability could be improved and smaller PDOP values could be obtained. While when the number of GPS observation satellites is less than 4, using the GPS/ GLONASS combined system would still obtain a positioning result in centimeter level, which ensures the continuity of dynamic measurement.
出处
《测绘科学》
CSCD
北大核心
2014年第3期124-126,156,共4页
Science of Surveying and Mapping
基金
国家自然科学基金(41101438)
