NAME: fieldobs PURPOSE: Real-time display of where objects are in the sky DESCRIPTION: CATEGORY: Astronomy CALLING SEQUENCE: fieldobs,file,AMCRIT=amcrit,OBSFILE=obsfile,OBSCODE=obs INPUTS: file - List of objects (for file format see LOADSTARS) to display OPTIONAL INPUT PARAMETERS: KEYWORD INPUT PARAMETERS: AMCRIT - Maximum airmass for plotted display (default = 2.5) DT - Offset from UT clock in hours. This is mostly for debugging purposes but may prove useful otherwise. OBSFILE - Location of observatory information file, default is /pub/sac0/elgb/data/obscode.dat OBSCODE - Observatory code, default = '688', Lowell Observatory OUTPUTS: KEYWORD OUTPUT PARAMETERS: COMMON BLOCKS: SIDE EFFECTS: RESTRICTIONS: PROCEDURE: MODIFICATION HISTORY: 97/05/28, Written by Marc W. Buie, Lowell Observatory 98/04/30, MWB, added some items to the plot. 2001/03/19, David Tucker, changed use of rdobscod for new file handling. 2001/04/18, MWB, changed systime call 2002/09/09, MWB, added support for string obscode values 2017/12/24, MWB, fixed minor bug for the amount of time shown to sunset during the first half of the day (while the Sun is still ascending)