摘要
为研究卫星在不同高度对地面重力变化的检测能力,利用地面获得的重力场时间和空间变化,采用空间域向上解析延拓原理,将地面数据向上解析延拓到数百千米的不同高度。计算分析表明,如果地表存在93×10-8ms-2的重力变化量,在450km高度可观测到20×10-8ms-2的重力变化。所以利用卫星重力观测技术进行地震监测,其观测精度应优于20×10-8ms-2。
In order to study the detection ability of a satellite at different height to ground gravity change and according to space analytic continuation principle, this paper makes an upward continuation of the ground gravity change to the height of several hundred km. The result shows that if there is gravity change of 93×10+{-8}ms+{-2} on the ground, a change of 20×10+{-8}ms+{-2} can be observed at the height of 450 km, so the observation accuracy should less than 20×10+{-8}ms+{-2} when monitoring seismicity by satellite gravity observing technology.
出处
《大地测量与地球动力学》
CSCD
北大核心
2005年第2期69-74,共6页
Journal of Geodesy and Geodynamics
基金
"863"课题:中国地震科学卫星计划的预研与制定(2003AA134060)
