PC -- Positions cursor at a desired point on the frame
   PC C
   PC L station
   PC E lat lon
   PC I line ele
   PC T raster pictel
Parameters:
   C | positions the cursor at the center of the frame
   L | positions the cursor at the station ID or synoptic ID
   E | positions the cursor at the lat and lon earth coordinates
   I | positions the cursor at the line and ele image coordinates
   T | positions the cursor at the raster and pictel TV coordinates
   station | 3-4 character or 5-6 digit station ID
   lat     | latitude of the location
   lon     | longitude of the location
   line    | image or graphics line of the location
   ele     | image or graphics element of the location
   raster  | TV raster (line) of the location
   pictel  | TV pictel (element) of the location
----------