BDS/GPS观测噪声对模糊度解算的影响分析  

Influence analysis of BDS/GPS observation noise on ambiguity resolution

作　　者：邱晓璐 刘根友[2] QIU Xiaolu LIU Genyou(Yantai Gold College, Zhaoyuan, Shandong 265400, China Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan, Hubei 430077, China)

机构地区：[1]烟台黄金职业学院,山东招远265400 [2]中国科学院测量与地球物理研究所,湖北武汉430077

出　　处：《导航定位学报》2016年第4期69-76,共8页Journal of Navigation and Positioning

基　　金：国家自然科学基金项目(41321063);大地测量与地球动力学国家重点实验室基金项目(SKLGED2013-4-1-Z)

摘　　要：针对观测噪声会影响模糊度正确解算的问题,提出采用观测数值仿真,从模糊度解算的正确性和模糊度识别的有效性2方面来分析BDS和GPS不同观测噪声对模糊度解算的影响。利用非差观测模型与双差观测模型的一致性,忽略电离层延迟及对流层延迟误差,选取中国大陆具有区域代表性的8个观测站进行实验,结果表明:无论从模糊度解算的正确性还是模糊度识别的有效性分析,BDS在各地区观测时长为30min时模糊度能成功固定的最大观测噪声与GPS观测时长为5min时相当,即与GPS相比,BDS的观测噪声较大、观测时间较短时,载波相位定位的模糊度很难成功固定。Aiming at the problem that observation noise can affect the proper ambiguity resolution, this paper presented u- sing the simulation of observation data to analyze the influence of different observation noises from BDS and GPS respectively on ambiguity resolution from both the correctness of the ambiguity resolution and the effectiveness of ambiguity recognition. The consistency between non-difference and double-difference observation model was utilized, and the ionospheric delay and tropo- spheric delay errors were ignored. Finally, eight stations which have regional representative in China were selected for experi- ment. Results indicated that analyzing from both the correctness of ambiguity resolution and effectiveness of ambiguity recogni- tion, the maximum observation noise with ambiguity fixed successfully when the observation time of BDS is 30 rain is quite similar with that when GPS is 5 min, showing that the carrier phase positioning ambiguity would be difficult to be fixed suc- cessfully when BDS observation noise is larger and the observation time is shorter than that of GPS.

关 键 词：BDS GPS 载波相位定位 观测噪声 整周模糊度 

分 类 号：P228[天文地球—大地测量学与测量工程]