卫星重力梯度测量中星载重力梯度仪潜在测量精度研究
发布时间：2019-05-03 21:00
【摘要】：目前卫星重力梯度测量精度主要受限于核心载荷重力梯度仪的噪声.要提高卫星重力梯度测量的精度,首先要发展更高精度的星载重力梯度仪.在该背景下,本文一方面针对已成功搭载GOCE卫星飞行的静电式重力梯度仪,基于静电控制的工作原理,探讨了静电式重力梯度仪测量精度的根本受限因素,分析表明,通过改进敏感探头的设计以及降低动态范围,静电重力梯度仪的极限测量分辨率可达0.3 m E/Hz1/2;另一方面,建议发展原子干涉型的星载重力梯度仪,在空间微重力环境下,其潜在测量灵敏度高达0.03 m E/Hz1/2,有望为未来完善50~100 km空间分辨率的全球重力场模型提供一种可能的技术途径.
[Abstract]:At present, the precision of satellite gravity gradient measurement is mainly limited by the noise of core load gravity gradiometer. In order to improve the precision of satellite gravity gradient measurement, the first step is to develop a higher precision spaceborne gravity gradiometer. In this context, on the one hand, aiming at the static gravity gradiometer which has successfully flown on the GOCE satellite, based on the working principle of electrostatic control, the fundamental limiting factors of the measurement precision of the electrostatic gravity gradiometer are discussed, and the analysis shows that: By improving the design of the sensitive probe and reducing the dynamic range, the ultimate measurement resolution of the electrostatic gravity gradiometer can reach 0.3 m E 路H\-z\-1\ +\ {1\}\ {2}\-2; On the other hand, it is proposed to develop an atomic interference-based spaceborne gravity gradiometer with a potential sensitivity of 0.03 m EZ _ 1 ~ 2 in a space microgravity environment. It is expected to provide a possible technical way to improve the global gravity field model of 50 ~ 100 km spatial resolution in the future.
【作者单位】： 上海卫星工程研究所;华中科技大学大学物理学院;华中科技大学地球物理研究所;
【基金】：国家自然科学基金(41504034,11574099)资助
【分类号】：P223
本文编号：2469276
[Abstract]:At present, the precision of satellite gravity gradient measurement is mainly limited by the noise of core load gravity gradiometer. In order to improve the precision of satellite gravity gradient measurement, the first step is to develop a higher precision spaceborne gravity gradiometer. In this context, on the one hand, aiming at the static gravity gradiometer which has successfully flown on the GOCE satellite, based on the working principle of electrostatic control, the fundamental limiting factors of the measurement precision of the electrostatic gravity gradiometer are discussed, and the analysis shows that: By improving the design of the sensitive probe and reducing the dynamic range, the ultimate measurement resolution of the electrostatic gravity gradiometer can reach 0.3 m E 路H\-z\-1\ +\ {1\}\ {2}\-2; On the other hand, it is proposed to develop an atomic interference-based spaceborne gravity gradiometer with a potential sensitivity of 0.03 m EZ _ 1 ~ 2 in a space microgravity environment. It is expected to provide a possible technical way to improve the global gravity field model of 50 ~ 100 km spatial resolution in the future.
【作者单位】： 上海卫星工程研究所;华中科技大学大学物理学院;华中科技大学地球物理研究所;
【基金】：国家自然科学基金(41504034,11574099)资助
【分类号】：P223
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