用Kaula线性摄动方法恢复CHAMP重力场模型  

CHAMP GRAVITY FIELD RECOVERY WITH KAULA LINEAR PERTURBATION METHOD

作　　者：徐天河[1] 居向明[2] 

机构地区：[1]西安测绘研究所,西安710054 [2]海军士官学校海测教研室,蚌埠233012

出　　处：《大地测量与地球动力学》2006年第4期18-21,26,共5页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(4027400240474001)

摘　　要：介绍了Kau la线性摄动方法的基本原理和算法,基于CHAMP几何法轨道和动力法轨道,给出了利用该方法恢复地球重力场模型的实现过程,分析了Kau la线性摄动方法在实际应用中需要注意的问题。基于德国慕尼黑技术大学提供的一个月的CHAMP几何法轨道和德国GFZ数据中心提供的快速科学轨道,计算出了50×50阶地球重力场模型CHAMP-Kau la1S,并与EIGEN-CG03C、EIGEN-CHAMP03S、EIGEN2、ENIGN1S、EGM96模型进行了比较。结果表明:X ISM-CHAMP1S模型精度明显优于相同阶次EIGEN1S模型,前40阶明显优于EGM96模型,而低于同阶次的EIGEN2和EIGEN-CHAMP03S模型精度。The basic theory and algorithm of Kaula linear perturbation are introduced. The Earth gravity field recovery by use of Kaula linear perturbation method is studied from CHAMP kinematic orbits and dynamic orbits. Some problems related to its applications are pointed out. A 50 degree and order gravitational potential model CHAMP-Kaulal S is determined with kinematic orbits for one month provided by Technical University of Munich and rapid science orbits provided by GFZ. The comparisons among CHAMP-KaulalS, EIGEN-CG03C, EIGEN- CHAMP03S, EIGEN2, ENIGN1S and EGM96 are made. The results show that CHAMP-KaulalS model is more accurate than EIGEN1S at the same degree and order, more accurate than EGM96 in former 40 degree and order, and less accurate than EIGEN2 and EIGEN-CHAMP03S.

关 键 词：Kaula线性摄动 地球重力场模型 动力法轨道 几何法轨道 快速科学轨道 

分 类 号：P227[天文地球—大地测量学与测量工程]