卫星跟踪卫星测量模式中星载加速度计高低灵敏轴分辨率指标优化设计论证  

Demonstration on the optimal design of resolution indexes of high and low sensitive axes from space-borne accelerometer in the satellite-to-satellite tracking model

作　　者：郑伟[1,2] 许厚泽[1] 钟敏[1] 员美娟[3] 周旭华[1] 彭碧波[1] 

机构地区：[1]中国科学院测量与地球物理研究所动力大地测量学重点实验室,武汉430077 [2]日本京都大学防灾研究所 [3]武汉科技大学应用物理系,武汉430081

出　　处：《地球物理学报》2009年第11期2712-2720,共9页Chinese Journal of Geophysics

基　　金：中国科学院知识创新工程重要方向项目(KZCX2-YW-143;KZCX2-YW-202);国家自然科学基金(40674038);国家高技术研究发展计划(863)(2009AA12Z138;2006AA09Z153);日本JSPS基盘研究项目(B19340129)资助

摘　　要：本文利用改进的能量守恒法开展了GRACE星载加速度计与K波段星间测速仪及GPS接收机精度指标之间的匹配模拟论证.结果表明:(1)采用GRACE公布的其他载荷精度指标,当加速度计分辨率指标设计为ACC_X=(1～10)×10^(-9)m/S^2,ACC_(Y,Z)=(1～10)×10^(-10)m/S^2时,在120阶处恢复累计大地水准面的精度为19～80cm,恢复1.5°×1.5°累计重力异常的精度为0.3～1.3 mGal;(2)建议我国将来卫星重力测量计划中星载加速度计三轴分辨率指标设计为ACC_X=(1～5)×10^(-9)m/S^2,ACC_(Y,Z)=(1～5)×10^(-10)m/S^2较合适,与GRACE其他载荷精度指标基本匹配.The matching relationship of accuracy indexes from GRACE accelerometer, K-band ranging system and GPS receiver is demonstrated by numerical simulation based on the improved energy conservation principle. The results show： Firstly, cumulative geoid height error comes to 19-80 cm and 1.5°×1.5° cumulative gravity anomaly error is at the level of 0.3-1.3 regal at degree 120, when the resolution of accelerometer is designed as ACCx = （1-10）×10^-9m/s^2and ACCy,z= （1 -10）×10^-10m/s^2 combined with other payloads with same accuracy indexes of GRACE; Secondly, it is appropriate to set the three-axis resolutions of accelerometer as ACCx =（1-5） ×10^-9m/s^2, ACCy,z = （1-5）×10^-10m/s^2 in the future satellite gravity measurement in China, which basically matches with GRACE other payloads.

关 键 词：GRACE 加速度计 指标论证 能量守恒法 地球重力场 

分 类 号：P223[天文地球—大地测量学与测量工程]