非圆轨道GPS/LEO掩星反演地球大气参数的算法及讨论  

Discussion on Algorithms of the Earth's Atmospheric Retrieval from Occultation of Non-circular Orbit GPS/LEO Satellites

作　　者：郭鹏[1] 蔡风景[2] 洪振杰[2] 严豪健[1] 刘敏[1] 

机构地区：[1]中国科学院上海天文台,上海200030 [2]温州师范学院数学与信息科学学院,浙江温州325027

出　　处：《天文学报》2004年第2期204-212,共9页Acta Astronomica Sinica

基　　金：CXJJ-97;国家自然科学基金(10073017);中国科学院知识创新工程重要方向项目KJCX2-SW-T1资助

摘　　要：在非圆轨道GPS和LEO卫星条件下,给出一种较为直接的GPS/LEO掩星反演地球大气参数技术中弯曲角序列的迭代算法,并在理论上对该迭代法的收敛性进行了严格的数学证明。利用GPS掩星反演模拟程序,定量估算了卫星圆轨道假设对GPS/LEO掩星反演地球大气参数的影响,并验证了在非圆轨道条件下各种迭代法的一致性。指出了文献中给出的级数展开迭代算法的不足之处。On the assumption of non--circular orbit for satellites GPS and LEO, a more direct iteration algorithm of atmospheric bending angles was given in GPS/LEO occultation technique probing Earth's atmosphere. A mathematical proof of the convergence of this it- eration method was listed. By means of the GPS occultation simulation software package SHAOOS, the influences of assumption of circular orbit GPS/LEO satellites on retrieved atmospheric profiles were estimated quantitatively, and to verify the coincidence between different iteration processes was also presented numerically. Some corrections to the series expansion method of non-circular orbit GPS/LEO occultation retrieval introduced in a ref- erence were briefly attached.

关 键 词：人造卫星 地球大气参数 GPS掩星 轨道假设 

分 类 号：P421[天文地球—大气科学及气象学] P128