新一代重力测量卫星核心指标分析

采用边界分析方法分析新一代重力测量卫星3个核心载荷--星间测距系统、非保守力测量仪和定位接收机的误差对恢复重力场的影响，提出新一代重力测量卫星的核心技术指标。分析表明，星间变率测量精度10~30 nm/s、非保守力测量精度（1~5）×10-11 m/s2、定轨精度2~3 cm时，可实现分辨率100 km、精度1~2 mGal的重力场测量。本文结论可为新一代重力测量卫星设计提供技术参考。

Core Indexes Design for the Next-Generation Satellite Gravimetry Mission

In this paper, we analyze the effects on the gravity model from inter-satellite ranging sensor, accelerometer and GNSS receiver errors. The results indicate that range-rate, non-gravity and position need to be surveyed with the accuracy 10-30 nm/s, (1-5)×10-11 m/s2 and 2-3 cm respectively. The accuracy of the gravity model recovered will be 1-2 mGal with 100 km space resolution. The conclusions are useful for developing the next-generation satellite gravimetry mission.