重力卫星主要有效载荷指标分析与确定

Analysis and Determination of the Major Payload Indexes for Gravity Exploring Satellite

摘要: 在介绍重力卫星发展计划的基础上,研究讨论了重力卫星上的主要有效载荷。从重力测量的基本原理出发,推导了卫星轨道高度、有效荷载的精度需求、所能恢复的重力场最大空间分辨率和相应重力场参数精度之间粗略的函数关系。最后利用推导的公式计算了CHAMP、GRACE、GOCE卫星上几种主要测量有效载荷的指标,并将推得的指标与CHAMP、GRACE、GOCE卫星设计的指标进行了比较,得出了两种指标在量级上一致的结论。

Abstract: According to the new generation of satellite exploring mission,this paper investigates the major pay loads of gravity exploring satellite.Based on the fundamental principle of gravity measurements,we derive the necessary satellite altitude,the accuracy requirements to be satisfied for the payloads,and the functional relationship between the highest resolution to be able to recover and the accuracies of the corresponding gravity field parameters.Finally,the authors calculate the indexes of the major measuring payloads of CHAMP,GRACE and GOCE satellites.