现有的固体潮和海洋负荷潮的模型用于岛礁重力测量的改正时,会产生较大的误差。利用短时间的重力观测数据建立测站的潮汐模型,可以明显地改善测站的潮汐模型,提高重力测量结果的精度,该方法可用于绝对和相对重力测量的潮汐改正。重力梯度同步观测方案不需要进行潮汐改正就可获得重力梯度,故不受潮汐模型误差的影响。
The existing tidal and ocean tide loading model produces large errors in tide corrections for gravity measurement on islands. A short period tidal model can significantly improve the tidal model and gravity measurement accuracy of a station, established through short period gravity measurement data at a station. This method can be applied to tide corrections of the absolute and relative gravity measurements. It does not need tidal correction to obtain the gravity gradient with simultaneous measurement scheme; therefore the gravity gradient is not subject to influence of tidal model errors.