No zero crossings were experienced. An aborted science observation occurred this week on Saturday Dec 30th. It was determined that the abort was due to an error with the Moving Target Table required by the IDS to implement the individual slews, which comprise the target trajectory. A corrected table was uplinked and the observation resumed approximately 10 hours later. Aside from the Aborted Observation described in item-1 above, two other Moving Targets were successfully executed on Dec 31st.
Preliminary analysis suggests that there was no impact from the event.
Cause is currently under investigation. Control center operations have been nominal this week.