NAME:
  occmag
 PURPOSE:   (one line only)
  Compute a scaled magnitude for occultation planning
 DESCRIPTION:
 CATEGORY:
  Occultations
 CALLING SEQUENCE:
  val=occmag(mag,diam,vel)
 INPUTS:
  mag  - Actual star magnitude
  diam - Diameter of object [km]
  vel  - Shadown velocity [km/sec]
 OPTIONAL INPUT PARAMETERS:
 KEYWORD INPUT PARAMETERS:
 OUTPUTS:
 KEYWORD OUTPUT PARAMETERS:
 CONFIGURATION:
 COMMON BLOCKS:
 SIDE EFFECTS:
 RESTRICTIONS:
 PROCEDURE:
 MODIFICATION HISTORY:
  Written by Marc W. Buie, Southwest Research Institute, 2022-01-11