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Instrument of Grace

机译:恩典仪

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摘要

The Gravity Recovery and Climate Experimen (GRACE) mission uses high-precision GPS mea surements, micron-level inter-satellite links, preci sion accelerometers, and accurate star cameras t( produce gravity field maps of the Earth that are order of magnitude more precise than current state-of-the art. GRACE will also measure temporal variations in the Earth's gravity field over a 5―year period. If the mission meets all of its goals, the knowledge of the gravitational field will be improved by a factor of well over 100, and changes in the field will be determined on a monthly basis. The improvement in the static (time-independent) gravity field will effectively eliminate the uncertainty in the height of the equipotential reference surface (referred to as the "geoid"), which is the largest error source for existing ocean altimetry missions such as TOPEX/Poseidon and Jason-1.
机译:重力恢复和气候实验(GRACE)任务使用高精度GPS测量,微米级卫星间链路,精密加速度计和精确的恒星摄像机t(产生了地球的重力场图,其精度更高了一个数量级) GRACE还将测量未来5年内地球重力场的时间变化,如果任务达到其所有目标,那么对重力场的了解将得到很好的改善超过100,并且将每月确定场的变化,静态(与时间无关)重力场的改进将有效消除等电位参考面(称为“地线”)高度的不确定性,这是现有海洋测高任务(例如TOPEX / Poseidon和Jason-1)的最大错误源。

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