GravityMap:

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   Create a gravity map,

   Type GravityMap for a demo.

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   Form:
   gMap = GravityMap( lat, lon, nN, nM, gravityModel, f )
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   ------
   Inputs
   ------
   lat          (1,:)    Latitude (rad)
   lon          (1,:)    Longitude (rad)
   nN           (1,1)    Highest zonal harmonic (m = 0) (empty gives the max #) 
   nM           (1,1)    Highest sectorial and tesseral harmonic 
                         (empty gives the max #) 
   gravityModel (1,1)    Data structure
                         .name (1,:) Model name
                         .mu   (1,1) Gravitational constant (km^3/sec^2)
                         .a    (1,1) Model earth radius (km)
                         .c    (n,n) Cosine coefficients
                         .s    (n,n) Sine coefficients
                         .j    (1,n) Zonal harmonics
   f           (1,1)    Flattening factor

   -------
   Outputs
   -------
   gMap        (lat,lon)  Gravity map in (m/s^2)

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Children:

Common: Coord/LatLonToR
Common: Database/Constant
Common: Graphics/Mesh2
Common: Math/Mag
Orbit: GravityModels/LoadGravityModel
Orbit: OrbitMechanics/AGravityC