CAJ | 학술논문

北斗导航系统与现有的由MEO组成的GPS和GLONASS卫星导航系统相比，增加了IGSO和GEO两种卫星，对亚太区域的导航和定位进行增强。但ISGO、GEO为高轨卫星，其运动角速度较慢，尤其是 GEO 卫星的角速度更慢，当这两种卫星参与高精度载波定位时，会对定位模型的结构产生影响。通过对GPS和Compass及组合的DOP值，双差伪距及载波的定权问题，以及IGSO、GEO、MEO卫星联合定位中模型的结构病态性的分析，来检验联合定位的效果。试验证明，GPS与Compass组合伪距定位能提高可靠性，同时证明了在使用载波定位时，单纯的IGSO/GEO的病态性严重，加入MEO后，能改善模型结构，并且提高了GEO/IGSO的模糊度收敛速度。
북두도항계통여현유적유MEO조성적GPS화GLONASS위성도항계통상비，증가료IGSO화GEO량충위성，대아태구역적도항화정위진행증강。단ISGO、GEO위고궤위성，기운동각속도교만，우기시 GEO 위성적각속도경만，당저량충위성삼여고정도재파정위시，회대정위모형적결구산생영향。통과대GPS화Compass급조합적DOP치，쌍차위거급재파적정권문제，이급IGSO、GEO、MEO위성연합정위중모형적결구병태성적분석，래검험연합정위적효과。시험증명，GPS여Compass조합위거정위능제고가고성，동시증명료재사용재파정위시，단순적IGSO/GEO적병태성엄중，가입MEO후，능개선모형결구，병차제고료GEO/IGSO적모호도수렴속도。
The Beidou navigation system can improve navigation and positioning in the Asian-Pacific region by adding the IGSO and GEO satellites, compared with the existing GPS made up of MEO and GLONASS. However, as high orbit satellites, the IGSO and GEO would influence the structure of positioning model when they carry out the high-precision carrier positioning due to their slower angular velocities. In this paper, the effects of the joint positioning are tested based on: 1) the DOP values of GPS, compass and their combination;2) the dual-difference pseudo range and the weight-confirming of carriers;3) the analysis to the ill-posedness of the model structure in the joint positioning;4) the analysis to IGSO, GEO and MEO. The test results show that the combination of GPS and compass can improve the reliability of pseudo-range positioning, and the single IGSO/GEO may cause serious ill-posedness in conducting the carrier positioning. The addition of MEO could better the model structure and improve the convergence rate of GEO/IGSO ambiguity.