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- 2017
绝对重力仪研制中仪器测量高度的计算
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Abstract:
在激光干涉绝对重力仪的研制中，每次测量落体都要自由下落7~20 cm的距离，在此过程中地表重力垂直梯度引入的误差最高可达60×10-8 m/s2。因此，需要计算出每次测量值对应的测量高度，即在该位置时，落体运动的距离内重力垂直梯度对绝对重力测量值的综合误差为零。基于对落体下落运动方程的分析，提出一了种新的绝对重力仪测量高度的计算方法。对比发现，当起始计算时间较小并接近于0（小于0.015 s）时，该算法与已有的算法结果具有较好的一致性，最大偏差不大于3 mm，梯度归算误差不大于1×10-8 m/s2（μGal）。在仪器自主研发的过程中，当起始计算时间较长（大于0.015 s）时，该算法可以更合理地计算绝对重力测量值对应的测量高度
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