Name

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L4_DAY_LAT_ALT

Purpose

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  This routine displays a keogram (x=time, y=lat) of L4 data.

Category

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  SNOE, image

Calling Sequence

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  L4_DAY_LAT_ALT_DAY, Coord, YYYYDDD0, YYYYDDD1

Inputs

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  COORD: The coordinate system of the data, either 'geo' or 'mag'
  YYYYDDD0: The start date
  YYYYDDD1: The stop date

Keyword Parameters

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  LV: The large value of the data [ !SNOE.f.l4_lv ]
  SV: The small value of the data [ lv / 20. ] used with /LOG only
  PS: Set this keyword to produce a POSTSCRIPT image
  CH: Set this to the desired channel to view [ 2 ]
  LOG: Set this if the log of the data should be imaged
  ALTITUDE: The altitude plane (in km) to use for the image
  FIX: Set this to linear interpolate over gaps of size 2 or
            less in the X direction
  EXTRA=e is used for:
      IMDISP: (INTERP, OUT_POS, etc. )
      DEVICE: (FILENAME, BITS_PER_PIXEL, PORTRAIT, LANDSCAPE, etc. )
      others...

Outputs

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  An image, or a PS file

Side Effects

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  Uses the PS device if /PS set. Uses the current WINDOW

Restrictions

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  Must be in a L4-type directory (needs NO_?_day_???.dat)

Example

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  To generate an image:
  L4_day_lat_alt_day, 'geo', 1998079, 1999079
  L4_day_lat_alt_day, 'mag', 1998070, 2002150, /LOG, /PS, /INTERP, $

Modification History

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  Written by: KDM; 2002-07-26
  KDM; 2002-08-27; yrange now represents latitude exactly [92.5]
  KDM; 2002-09-01; /swap_if_big_endian
  KDM; 2002-09-02; Added FIX keyword, and fixed xaxis tick values
  KDM; 2002-09-10; Added _EXTRA=e to OPENR for any-endian usability
  KDM; 2002-09-13; Fix: cbar text was wrong color in PS