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

页码：44 / 51

页数：8

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