摘要
基于TCAR方法,对影响模糊度固定的电离层残差因素进行分析,指出同测站间基线的长短一样,差分卫星间的水平距离也能够影响双差电离层残差的大小,并用实测北斗三频数据验证。实验结果表明对17km短基线,较大的差分卫星间水平距离会降低窄巷模糊度固定的成功率;而对于72.6km的中等长度基线,当双差卫星间水平距离减小时双差电离层残差随之减小,利于窄巷模糊度的固定。
Based on the TCAR method,this paper analyzes the factors of double-difference（DD）ionospheric residual which affects the fixing of narrow-lane ambiguity,and points out the length of the baseline between stations as well as the difference of the distance between the satellites affecting the size of the ionosphere residual,on which the measured data of the triple frequency is verified.The experimental results show that for the 17 km short baseline,larger distance between the difference satellites will reduce the success rate of fixed narrow ambiguity.However,for 72.6km medium length baseline,the shorter distance between the DD satellites will lead to smaller double-difference ionospheric residual,which is conducive to the fixing of narrow lane ambiguity.
出处
《测绘工程》
CSCD
2016年第7期66-70,77,共6页
Engineering of Surveying and Mapping
基金
国家自然科学基金资助项目(41174006)
中国博士后科学基金资助项目(201003772
20100481458)
关键词
TCAR
北斗三频
模糊度固定
双差电离层残差
卫星间水平距离
TCAR
BDS three frequencies
ambiguity resolution
DD ionospheric residual
horizontal distance between the satellites
