G2M

Name

G2M

Purpose

Translate from geographic to magnetic (CGM) 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.

G2M