双星伴飞卫星测高模式及其轨道设计

为达到提高反演海洋重力场分辨率的要求，本文提出一种双星伴飞的测高卫星模式，并根据卫星轨道设计的基本要求，给出相应的卫星轨道设计方案。仿真分析表明，该方案可在卫星设计寿命内完成反演1′×1′空间分辨率海洋重力场的要求，且观测数据覆盖了全球大部分海洋区域。该模式可实现星下点海平面梯度的实时测量，提出了改进测高反演海洋重力场的精度的新思路。

Twin-satellites altimetry mode and its orbit design

To enhance the resolution of recovery of marine gravity field from satellite altimeter, we proposed a new twin-satellites altimetry mode in this paper. A detailed orbit design is also presented following the basic requirements of satellite’s orbit design. It is also demonstrated that the 1 min marine altimetry gravity field can be derived to satisfy the requirement of high resolution. The observation of twin-satellite will cover most of the oceans and seas of the Earth. Besides the sea surface height observations, the new model will provide two components of deflection of verticals along the track, which will contribute to the improvement of accuracy of marine altimetry gravity field.