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EGM重力场模型使用说明
EGM官网上提供的程序系Fortran语言编写，文件名为geopot9stfite丄lipsoidoraQfi?aupotentialvalued,givethegeoidundulationanditanonta?=Givenanelli卫wozhlmlnormalgravityfieId,andhoundoriesofellipsoidallatitudeandlon^itude^computetliegeoidundulationsand/orgravityanomaliesonainthemasses*10=GivenanellipsoidalnormalgvavityFieId,andboundariesofellipsoidallatitudeandlongitude,conputetheliei^fhtanomali/rasue11asthe1stand2ndorderupwardderivativesoftheheightanomaly,allontheellipsoid・11=GivenaDIEDCHoi*h>,computeagridoffijravityvaluesattheSurfaceoftheEarth
输入：7
Thedegreeinthecoefficientsetis:3£0
Whatisthemaximumdecreeyouvrantused?.
输入：360ThemaxifiumdegreeinthecoefFieientsetis:360Uliatisthenaximumde^pee*ouuantused?260Tlietidesystemfopanyoutputqu&ntitlescandifferfpomthatofthecoefficientsAnd/opthe
fieIdifused>.ThereFot^cr炉七tidesystenshallallvaluesbecomputedin?
1:mean
2'zero
3:non-
<ThecoefFicientsareinthenon-tidesjjsten)输入：-calledbest-fittingellipsoid,butisrathertheactualellipsoidtowhichtUieundulationswillrefer-Thenethodtobeusedismethod1*3(NotebookDRU-3p«58>>******@Qneti*ictransfernations.
So^letusproceed.«...
HowshallthenormalfieIdbedescribed?
1 —a,J2GM^oneQfa
2 —a^
-djibjiGH^omegia输入：2（也可以选择1、3）选择2即需要输入地球赤道半径a、地球变率系数、地球引力