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首页> 外文期刊>Transactions of the Japan society for aeronautical and space sciences >Efficient Calibration of the Non-Conservative Force Data from the Space-Borne Accelerometers of the Twin GRACE Satellites
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Efficient Calibration of the Non-Conservative Force Data from the Space-Borne Accelerometers of the Twin GRACE Satellites

机译：双GRACE卫星的空间加速度计的非保守力数据的有效校准

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摘要

Different from calibrations previously conducted using the dynamic method, the GRACE-Level-IB non-conservative force data from the space-borne accelerometers between 1 January to 31 December, 2009, released by the Jet Propulsion Laboratory in the United States of America, is for the first time ever effectively calibrated using the priori Earth gravitational field model based on an improved energy conservation principle. The results are shown as follows: 1) The non-conservative force data from the space-borne accelerometers and attitude data from the star camera assembly are basically the same as the anticipated accuracies; 2) the systematic error of the raw non-conservative force data leads to a disturbed geopotential error linear drift of about 0.4 m2/s2 per day, however, the error is only 0.01 m2/s2 using the calibrated non-conservative force data, and a reasonable physical explanation is provided; 3) the advantages and disadvantages of calibrating non-conservative force data using the energy conservation principle and dynamic method are compared in detail; and 4) because the signal of the Earth's gravitational field is sensitive to the systematic error of non-conservative force data from the space-borne accelerometers, the precise calibration of non-conservative force data is a key factor for the highly accurate recovery of the Earth gravitational field with high spatial resolution.
机译：与先前使用动态方法进行的校准不同，美国喷气推进实验室在2009年1月1日至12月31日期间从星载加速度计获得的GRACE-Level-IB非保守力数据为这是有史以来第一次使用基于改进的节能原理的先验地球引力场模型进行有效校准。结果表明：1）来自星载加速度计的非保守力数据和来自星相机组件的姿态数据与预期精度基本相同； 2）原始非保守力数据的系统误差导致每天约0.4 m2 / s2的扰动地势误差线性漂移，但是，使用校准后的非保守力数据的误差仅为0.01 m2 / s2，并且提供合理的物理解释； 3）详细比较了采用能量守恒原理和动态方法标定非保守力数据的优缺点；和4）由于地球重力场的信号对来自星载加速度计的非保守力数据的系统误差很敏感，因此，非保守力数据的精确校准是高度精确地恢复星载加速度数据的关键因素。具有高空间分辨率的地球引力场。

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