Gravity Base Net Data Processing

This paPer mainly fOcuses on the stUdy of the dam pre-processing of the gravitybase net such as the corrections of the hdes of the solid earth, and the adjustmentcompUtaion. When dealing with the correction5 of the tides of the solid earth, thewriter first discusses the fimdamental theory of the solid hdes, then treats thedifferences and the senses of the four formulae of solid tides, finaily puts forward themethod of subarea computaion on the evaluation of solid tides facors in order toweaken the errors that result from the caIculating of the mean value of tides factors.As far as the oceboc tides is concemed, thes paPer has a deulled stUdy over theaPplicable formula of oceanic tides on the grotmds of the fundamental theory ofoceboc tides, and analyses the newly published oceanic models that is acquiredthrough the sate1lite altimetry and the finite element method. During the stUdy of theinfiuence of the undeopund water and the crustal movement that belong to thenon4idal changes of the gravity field, the induence of the waer recycle on gravity isfirst exPlained and the correction formula of the underground water influence isStudied, and then after the effeCt of crund movemeni on gravity is analysed, thecorrection formula of the infiuence of the crUStal movement on graVity is discussedand set uP in tWo kinds of movement that is, in vertical and horizonta directions.When the scae calibration and the zero drift correCtion of the LCR graVimeter arestUdie4 according to the exPression of the scale function of LCR gravimetef, thewriter firS anayses the value of the whuence of the scale forrs on the errorsystematically, then discusses the selection method of the scale fastor and thendiscusses the non-linear problem of the zero drift and brings forward a computingmethod of funCtion fitting. In the adjustment of the gravity base net the difference ofthe tWo relative graVimetric equaions and itS influence on accuraC are mainlyStudied, and the relativity of gravimetric net adjustmeni is deduced, and finally a newmethod of gross error procession is intfOduced.