基于iau2000a章动模型格林尼治恒心时计算参数表gst

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1、基于IAU2000A章动模型的格林尼治恒心时计算参数表GSTExpressionforGreenwichSiderealTimebasedontheIAU2000Aprecession-nutationmodelExpressionensuringcontinuityofUT1on1stJanuary2003--------------------------------------------------------------------------------------------------------------GST=Theta(UT1)+polynomialpart+D

2、eltaPsi*cos(epsilon_A)+non-polynomialpart--------------------------------------------------------------------------------------------------------------Theta(UT1)=2*Pi*(0.7790572732640+1.00273781191135448.T_u)whereT_u=JulianUT1date-2451545.0,andUT1=UTC+(UT1-UTC)-----------------------------------

3、---------------------------------------------------------------------------Polynomialpart(unitarcsecond)0''.014506+4612''.15739966t+1''.39667721t^2-0''.00009344t^3+0''.00001882t^4--------------------------------------------------------------------------------------------------------------DeltaPs

4、i*cos(epsilon_A)=classicalexpressionfortheequationoftheequinoxes--------------------------------------------------------------------------------------------------------------Non-polynomialpart(unitmicroarcsecond)(ARGbeingforvariouscombinationofthefundamentalargumentsofthenutationtheory)Sum_i[C_{

5、s,0})_i*sin(ARG)+C_{c,0})_i*cos(ARG)]+Sum_i[C_{s,1})_i*t*sin(ARG)+C_{c,1})_i*cos(ARG)]*t]TheTablebelowprovidesthevaluesforC_{s,j})_iandC_{c,j})_iCutoff(0.1microarcsecondandperiodslessthan500years)Theexpressionsforthefundamentalargumentsappearingincolumns4to8(luni-solarpart)andincolumns6to17(plan

6、etarypart)arethoseoftheIERSConventions2000--------------------------------------------------------------------------------------------------------------iC_{s,j})_iC_{c,j})_ill'FDOmL_MeL_VeL_EL_MaL_JL_SaL_UL_Nep_A------------------------------------------------------------------------------------

7、--------------------------j=0Nbofterms=3312640.96-0.3900001000000000263.52-0.0200002000000000311.750.01002-23000000000411.210.01002-210000000005-4.550.00002-2200000000062.020.000020300000000071.980.00002010000000008-1.720.00