| Description: The image_time element is duplicated from the PDS3 label. It provides Time of shutter close calculated from spacecraft clock using both the coarse (seconds) and fine (subRTI) counters (UTC). (A subRTI is approximately 4 msec (1/256 second)). The value is identical to that given in start_time_doy, and start_date_time. Although it is redundant, it is retained here for historical reasons. When the shutter was inhibited (ie SHUTTER_STATE_ID=”DISABLED”), the IMAGE_TIME = START_TIME = STOP_TIME, and all three represent the start of the exposure window during the prepare cycle of the image. |