Path: Orbit/OrbitManeuver

% Delta-V needed to control the longitudinal acceleration in geo. 
   Computes the delta-v needed per year to control the longitudinal
   acceleration due to the Earth triaxial gravitational harmonics in
   geosynchronous orbit. 

   The time between maneuvers will be infinite at the stable points.

   If the gravitational parameters are not entered it will load 
   the GEM-T1 model.

   Type DVGeoTrx for a demo.

   Since version 1.
   [dV, acc, dT] = DVGeoTrx( lon, box, s, c, j, mu, a )

   lon         (1,:)    East longitude (deg)
   box         (1,1)    Stationkeeping box (deg)
   s           (36,36)  S terms
   c           (36,36)  C terms
   j              (36)  m = 0 terms
   mu          (1,1)    Spherical gravitational potential
   a           (1,1)    Earth radius

   dV          (1,:)    Total delta v per year (m/sec)
   acc         (1,:)    Acceleration (deg/day^2)
   dT          (1,:)    Time between maneuvers



Common: Graphics/Plot2D
Orbit: GravityModels/LoadGEM
Orbit: OrbitMechanics/AGravity

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