摘要
在几何光学和薄相位屏的假设下,给出GPS／LEO无线电掩星反演地球大气技 术中振幅反演的计算方法.从产生接收信号振幅变化的机制出发,提出产生信号振幅变化 的几何衰减和物理衰减两个不同的源.利用CHAMP卫星观测资料的个例,用观测信噪 比序列进行了大气弯曲角、大气折射率、压力、温度剖面的反演;并与相位反演结果进行 比较和讨论.
Under the assumptions of geometric optics and thin phase screen the retrieval algorithms of amplitude in GPS/LEO occultation technique were listed. Geometric and physical decay sources producing observed signal amplitude variations were sorted according to their physical mechanisms. Using CHAMP observational data samples, the profiles of atmospheric bending, refractivity, pressure, and temperature were retrieved in tern by the series of signal noise ratio. The results were compared and discussed with that from phase process. The influences of both geometric and physical sources on the atmospheric retrievals were analyzed briefly.
出处
《天文学报》
CSCD
北大核心
2005年第1期84-95,共12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走天地球动力学研究中心资助
