pmtras_time_option

There are three choices for computing pmt_time_range based on the value of pmtras_time_option (all three are extended by the RAS_TIME_EXTENSION):

'CLIP2IMAGE' - Uses OBS_TIME_INTERVAL if the extent is lt 4400 sec, otherwise it reverts to single image option 'IMAGE' below

'IMAGE' - Always uses the current image time interval via ASPECT_TIME_RANGE

'OBS_TIME' - Always uses the OBS_TIME_INTERVAL regardless of the duration