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GEO2MAG

GEO2MAG

Name


      GEO2MAG()

Purpose


      Convert from geographic to geomagnetic coordinates

Explanation


      Converts from GEOGRAPHIC (latitude,longitude) to GEOMAGNETIC (latitude,
      longitude). (Altitude remains the same)
      Latitudes and longitudes are expressed in degrees.

Calling Sequence


      mcoord=geo2mag(gcoord)

Input


      gcoord = a 2-element array of geographic [latitude,longitude], or an
                array [2,n] of n such coordinates.

Keyword Inputs


      None

Output


      a 2-element array of magnetic [latitude,longitude], or an array [2,n]
        of n such coordinates

Common Blocks


      None

Examples


      geographic coordinates of magnetic south pole
      IDL> mcoord=geo2mag([79.3,288.59])
      IDL> print,mcoord
      89.999992 -173.02325

Modification History


      Written by Pascal Saint-Hilaire (Saint-Hilaire@astro.phys.ethz.ch),
            May 2002
             



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