Welcome to the Harris Geospatial product documentation center. Here you will find reference guides, help documents, and product libraries.


G2M

G2M

Name


G2M

Purpose


      Translate from geographic to magnetic (CGM) coordinates

Category


      SNOE, coordinates

Calling Sequence


      G2M, Glat, Glon, Year, Mlat, Mlon

Inputs


      Glat: An array of latitudes. Should be in geographic
              coords. This array can be of any size and of any
              number of dimensions.
      Glon: A vector of geographic longitudes. Must contain a
              valid number for each element in the Glat
              array. Longitudes can be either -180W to 180E, or 0E
              to 360E.
      Year: The year to use for the CGM model

Keyword Parameters


      LSHELL: Set this keyword to a variable that will contain the
              Lshell values for each [Glat,Glon] pair.
      BFIELD: Set this keyword to a variable that will contain the
              B Field Strength for each [Glat,Glon] pair.

Outputs


      Mlat: (output) Magnetic latitudes corresponding to each
              [Glat,Glon] pair
      Mlon: (output) Magnetic longitudes corresponding to each
              [Glat,Glon] pair. Matches each Mlat value. The output
              longitudes are ALWAYS on a -180W to 180E grid.

Dependencies


      Uses LOAD_CGM.PRO
            RANGECIR.PRO

Example


      G2M, [-90,-60,-30,0,30,60,90], [0,0,0,0,0,0,0], 1998, Mlat, Mlon
      G2M, [0], [0], 1998, Mlat, Mlon, lshell=lshell, bfield=bfield

Modification History


  Written by: Ken Mankoff, September 2001.



© 2017 Exelis Visual Information Solutions, Inc. |  Legal
My Account    |    Buy    |    Contact Us