衛(wèi)星重力梯度測量中星載重力梯度儀潛在測量精度研究
發(fā)布時間：2019-05-03 21:00
【摘要】：目前衛(wèi)星重力梯度測量精度主要受限于核心載荷重力梯度儀的噪聲.要提高衛(wèi)星重力梯度測量的精度,首先要發(fā)展更高精度的星載重力梯度儀.在該背景下,本文一方面針對已成功搭載GOCE衛(wèi)星飛行的靜電式重力梯度儀,基于靜電控制的工作原理,探討了靜電式重力梯度儀測量精度的根本受限因素,分析表明,通過改進敏感探頭的設(shè)計以及降低動態(tài)范圍,靜電重力梯度儀的極限測量分辨率可達0.3 m E/Hz1/2;另一方面,建議發(fā)展原子干涉型的星載重力梯度儀,在空間微重力環(huán)境下,其潛在測量靈敏度高達0.03 m E/Hz1/2,有望為未來完善50~100 km空間分辨率的全球重力場模型提供一種可能的技術(shù)途徑.
[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.
【作者單位】： 上海衛(wèi)星工程研究所;華中科技大學大學物理學院;華中科技大學地球物理研究所;
【基金】：國家自然科學基金(41504034,11574099)資助
【分類號】：P223
本文編號：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.
【作者單位】： 上海衛(wèi)星工程研究所;華中科技大學大學物理學院;華中科技大學地球物理研究所;
【基金】：國家自然科學基金(41504034,11574099)資助
【分類號】：P223
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