Procedure: AACGM_PLOT Description: Parameterized aacgm coordinate plotting routine. Run the routine with the appropriate coordinates and it will plot a grid representing corrected geomagnetic coordinates in magnetic local time. If you provide no local time, this routine will assume a local time of 2008-01-01/00:00:00 UT Based upon aacgm_example of Eric Donovan @ U. Calgary This routine uses AACGM code written by R.J. Barnes,Kile Baker, and Simon Wing. Their AACGM code was modified slightly for use in the themis distribution. Keywords(All input lats/lons are in degrees): lat_center: The latitudinal center of the projection that you want to plot.(Default: 62) lon_center: The longitudinal center of the projection that you want to plot.(Default: 256) map_scale: Set the scale of the map presented. This is the same as the map scale argument to other idl mapping routines. (Default: 42e6) height: The height at which coordinates should be plotted. Note that coordinates may not be calculable at low heights when plotting near the equator.(Default: 110) local_time: The time in UT that should be assumed for MLT(default: '2008-01-01/00:00:00' UT) lat_range: A two element array that represents the maximum and minimum latitude that should be calculated. Smaller ranges speed up calculations.(Default: [50,70]) lon_range: A two element array that represents the maximum and minimum longitude that should be calculated(in local magnetic coords) Smaller ranges speed up calculations. (Default: [0,360]) lat_step: The size of latitudinal steps between lines. (Default:5) lon_step: The size of longitudinal steps between lines. (Default:15) lab_step: The number of N-S lines between labels (Default: 6) n_lat_pts: The number of points per globe to use when drawing E-W lines. (Default: 360) n_lon_pts: The number of points per globe to use when drawing N-S lines. (Default: 180) lab_pos: The argument controls the position of the labels in the N-S direction 0: Draws the labels at the closest latitude to the equator(Default) 1: Draws the labels at the maximum latitude in the range. -1: Draws the labels at the minimum latitude in the range projection: The type of projection as a string. Default is 'orthographic', but you can select any of the projections that are usually available to the map set routine. To see a list of available projections type: 'MAP_PROJ_INFO, PROJ_NAMES=names & print,names' You can also pass in any keywords that the plot command or the map_set command take. These can be useful for things like controlling line thickness when exporting graphics. Notes: 1. This routine loads the AACGM coefficients for the current time period( 2005-2010) If this routine is being used for times outside this period, features need to be added to utilize the aacgmidl routines that load other coordinate sets. 2. If you can think of any features that might ease usability please feel free to contact us. $LastChangedBy: pcruce $ $LastChangedDate: 2008-09-18 15:48:50 -0700 (Thu, 18 Sep 2008) $ $LastChangedRevision: 3517 $ $URL: svn+ssh://thmsvn@ambrosia.ssl.berkeley.edu/repos/spdsoft/trunk/general/cotrans/aacgm/aacgm_plot.pro $