PACORB -- Displays polar-orbiter tracks and coverage for Pacific Test Range
   PACORB navdataset frame <keywords>
   PACORB imgdataset frame <keywords>
Parameters:
   navdataset | name of ADDE dataset containing system navigation files
                for a satellite; specify as group/descriptor or alias
   imgdataset | name and position of ADDE dataset containing the image
                to use as a navigation source; specify as alias.position
                or group/descriptor.position; you must also specify TYPE=I
                to indicate this is an image dataset (def=0 for position)
   frame | frame number to display the output (def=current)
Keywords:
   CCOLOR= | graphics color level of coverage edges; use positive numbers
             for solid lines and negative for dashed; see Remarks
             (def=0, do not plot)
   DAY=bday eday | beginning and ending day of plot; see Remarks
                   (def=current, or from 'imgdataset')
   HORIZON=kwj vbg | minimum angle, in degrees, above horizon at which
                     satellite signal is readable at Kwajalein [kwj]
                     and Vandenberg AFB [vbg] (def=5 5)
   INT= | interval, in seconds, between time marks on tracks (def=computed)
   LABEL='text' loc col | display label, location and color where:
                          'text' - label or description (def=computed)
                          loc - frame location for label; specify a number
                                 between 1 and 5; see Remarks (def=1)
                          col - graphics color level for label (def=CCOLOR
                                if used; otherwise TRCOLOR)
   NAV=C | use existing frame navigation; use this keyword to overlay
           additional orbital tracks on the same frame (def=erase frame
           and redraw map)
   SENSOR= | sensor type; valid POES types: AVHRR (def), HIRS, or MSU;
             valid DMSP types: OLS (def), SSM/I, SSM/T, or SSM/T2
   TIME=btime etime | beginning and ending time of plot; see Remarks
                      (def=0 23:59:59, or from 'imgdataset')
   TMCOLOR= | graphics color level of time marks (def=3)
   TRCOLOR= | graphics color level of orbital track; use positive numbers
              for solid lines and negative for dashed (def=2)
   TYPE=S | use system navigation files specified in 'navdataset' (def)
       =I | use navigation of image specfied in 'imgdataset'; overrides
            SENSOR keyword
Remarks:
   Use both the DAY and TIME keywords to specify the time period for
   plotting orbital tracks and coverage. For example, DAY=182 183 TIME=21 3
   specifies a range from 21 UTC on day 182 through 03 UTC on day 183.

   If you specify the CCOLOR keyword and TYPE=I without the DAY or TIME
   keyword, the displayed geographical coverage is limited to the image
   specified in 'imgdataset'. Otherwise, the entire geographical coverage
   of the satellite sensor is displayed.

   Specify NAV=C to overlay additional orbital tracks on the same frame.
   Use the 'loc' parameter with the LABEL keyword to place additional
   labels on different lines at the bottom of the frame.  Location 1 is
   the top line, location 2 is below 1, location 3 is below 2, etc.
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