北斗卫星伪距码偏差特性及其影响分析

发布时间：2019-03-26 10:01

【摘要】：在北斗导航卫星伪距码偏差特性分析的基础上,建立了倾斜地球同步轨道卫星(IGSO)和中轨卫星(MEO)的伪距码偏差多项式改正模型;并利用星间单差宽巷小数周一致性,分析建立北斗地球同步轨道卫星(GEO)卫星伪距码偏差改正模型。采用武汉大学北斗试验网、中国陆态网络和MGEX网不同位置、不同类型接收机观测数据进行分析验证,结果表明,北斗卫星伪距码偏差特性与观测值频率、卫星类型相关,所有GEO和IGSO卫星变化规律相同,所有MEO卫星变化规律相同,与接收机类型、测站位置和观测时间无关,偏差值大小随卫星高度角变化,其变化规律稳定,可以采用建立的两类改正模型(GEO/IGSO和MEO)进行修正。通过偏差修正后的伪距无电离层组合的残差、双频SPP以及单频PPP三个方面验证了伪距码偏差改正模型的正确性。
[Abstract]:Based on the analysis of PN code deviation characteristics of Beidou navigation satellite, a polynomial correction model of PN code deviation for tilted geosynchronous orbit satellite (IGSO) and mid-orbit satellite (MEO) is established. The error correction model of pseudo-range code of (GEO) satellite in Beidou geosynchronous orbit is established by using the fractional cycle consistency of single difference wide lane between satellites. By using Wuhan University Beidou test network, Chinese land state network and MGEX network at different positions and different types of receiver observation data, the results show that the error characteristics of the PN code of Beidou satellite are related to the observed frequency and satellite type, and the error characteristics of the PN code of the Beidou satellite are correlated with the observed frequency and the satellite type. The variation law of all GEO and IGSO satellites is the same as that of all MEO satellites, independent of the receiver type, station position and observation time, and the deviation value varies with the satellite altitude angle, and the variation rule is stable. Two kinds of correction models (GEO/IGSO and MEO) can be used for correction. The correctness of the pseudo-range error correction model is verified by the residual error of the pseudo-range-free ionospheric combination, the dual-frequency SPP and the single-frequency PPP of the error-corrected pseudo-range code.
【作者单位】：武汉大学卫星导航定位技术研究中心;
【基金】：国家重点研发计划(2016YFB0501802) 国家自然科学基金(41374034,41504028) 国家863计划(2014AA123101)~~
【分类号】：TN967.1

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