Effect of different inter-satellite range on measurement precision of Earth’s gravitational field from GRACE

被引：0
|
作者：
Zheng Wei1
机构：
来源：
Geodesy and Geodynamics | 2012年 / 01期
基金：
中国国家自然科学基金;
关键词：
GRACE; inter-satellite range; colored noise; Earth’s gravitational field; energy conservation principle;
D O I：
暂无
中图分类号：
P224.1 [水准测量];
学科分类号：
081601 ;
摘要：
The precision of Earth’s gravitational field from GRACE up to degree and order 120 was studied for different inter-satellite ranges using the improved energy conservation principle.Our simulated result shows that:For long wavelength(L≤20)at degree 20,the cumulative geoid-height error gradually decreased with increasing range,from 0.052 cm for 110 km to 1.156 times and 1.209 times as large for 220 km and 330 km,respectively.For medium-wavelength(100≤L≤120)at degree 120,the cumulative geoid-height error decreased from 13.052 cm for 110 km,to 1.327 times and 1.970 times as large for the ranges of 220 km and 330 km,respectively;By adopting an optimal range of 220±50 km,we can suppress considerably the loss of precision in the measurement of the Earth’s long-wavelength and medium-wavelength gravitational field.
引用
收藏
页码：44 / 51
页数：8
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