摘要
针对两段北斗/GPS双系统的短基线,对比分析北斗B1和B2、GPS的L1和L2频率上伪距和相位的观测值精度、卫星精度与高度角的关系,以及不同类型观测值之间的交叉相关性。结果表明:北斗短基线观测精度与GPS精度相当,北斗系统的MEO卫星的观测精度最高,其次为IGSO和GEO卫星;北斗与GPS的精度与高度角存在不同程度的相关性;采用的接收机北斗B1和B2、GPS的L1和L2频率上的相位观测值存在弱相关,其他类型的交叉相关性不明显。
In this contribution,it presents the stochastic characteristics of Beidou observations on both B1 and B2frequency compared with GPS counterparts.The studies include the observation precision and its elevation-dependence as well as the correlation between different observation types.The results show the observation precision of Beidou is comparable with GPS.The precision of MEO satellites is better than IGSO and GEO satellites.All the observation types of both Beidou and GPS are elevation-dependent with different extent.According to the receiver,the phase observations of Beidou B1 and B2as well as GPS L1 and L2are slightly correlated,whereas the cross correlations between the other observation types are not observed.
出处
《测绘工程》
CSCD
2014年第10期9-13,共5页
Engineering of Surveying and Mapping
基金
国家自然基金资助项目(41074018
41104002)
关键词
北斗
GPS
观测精度
高度角
交叉相关性
Beidou
GPS
observation precision
elevation-dependence
correlation
