岛礁重力测量潮汐改正新方法

The New Method of Tidal Correction for Gravity Measurement on Island

摘要: 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。

Abstract: Theexistingtidalandoceantideloadingmodelproduceslargeerrorsintidecorrectionsforgravitymeasurementonislands.Ashortperiodtidalmodelcansignificantlyimprovethetidalmodelandgravitymeasurementaccuracyofastation,establishedthroughshortperiodgravitymeasurementdataatastation.Thismethodcanbeappliedtotidecorrectionsoftheabsoluteandrelativegravitymeasurements.Itdoesnotneedtidalcorrectiontoobtainthegravitygradientwithsimultaneousmeas urementscheme;thereforethegravitygradientisnotsubjecttoinfluenceoftidalmodelerrors.