------------------------------------------------------------------------------- Delta-V needed per year to control the longitudinal acceleration in GEO. Computes the delta-v needed per year to control the longitudinal acceleration due to earth gravitational harmonics in geosynchronous orbit. If the gravitational parameters are not entered it will load the GEM-T1 model. ------------------------------------------------------------------------------- Form: [dV, acc, dT] = DVGeoTrx( lon, box, s, c, j, mu, a ) ------------------------------------------------------------------------------- ------ Inputs ------ lon (1,:) East longitude (deg) box (1,1) Box (deg) s (36,36) S terms c (36,36) C terms j (36) m = 0 terms mu Spherical gravitational potential a Earth radius ------- Outputs ------- dV Total delta v per year (m/sec) acc Acceleration (deg/day^2) dT Time between maneuvers -------------------------------------------------------------------------------