MAGNETIC FIELD LINE FOR ExPRES

The set of routine used to produce the .mfl files are available from:
https://gitlab.obspm.fr/maser/lesia-mag/lesia-mag_idl


MAGNETIC FIELD LINE FORMAT FOR ExPRES

(1) FOLDERS XXX_lat and XXX_lsh (XXX=model's name)
|
|	contain field lines mapping at a given latitude on the planet (lat from 1 to 90 deg by 1deg step)
|	or a given distance in the equatorial plane (lsh from 2 to 50 by 1 planet radius step)
|
|_(2) Either FOLDERS (0,1,2,...N) or files (0,1,2,...N, -0,-1,...)
   |
   |	numbers correspond to lat or lsh, folder for non axisymmetric, files for axisymmetric (sign=north/south)
   |
   |_ files (0,1,2,...359, -0,-1,...,-359)
	numbers correspond to longitudes (sign to north/south)

	field lines are stored from 2.9*(1E-3 *dip moment in Gauss) MHz to the max frequency by steps of 2.9*(1E-3 *dip moment in Gauss) MHz
	

FORMAT
      LONG  [1]  n = number of points in the file
      LONG  [n]  x = x position of the points
      LONG  [n]  y = y position of the points
      LONG  [n]  z = z position of the points
      LONG  [3,n] b = b unitary vector
      LONG  [n]  f = frequencies
---------------------------------------------- ^ equiv old versions of SERPE
      LONG  [n]  Gwc = delta ln(wc) over c/wc
      LONG  [3,n] bz = b basis zenith vector
      LONG  [3,n] gb = grad b direction (in b basis)