SMOV STATUS & PLANNING MEETING -  25 APR. 97
			http://www.stsci.edu/smov/

NOTE:  The next meeting is April 28, 8:30 AM.


STATUS REPORTS

1.  Observatory Status - All systems nominal.

	PCS - Later today, a gryo high-dode test will be run in order
		to collect data for a high-mode bias calculation.


2.  WFPC2 Status - Proceeding nominally with Cycle 6 science and
	remaining SMOV monitors.  
  

3.  NICMOS Status

	- Engineering Status - Nominal

	  At 106/1701, experience another thermal Controller Set Point
	  corruption.  The set point was reset by the SMS per design.
	  This is the second instance of an SMS correction to a set point
	  corruption since the SMS protection was installed.

	  Detector 1 Mounting Cup temperature is stable at 61.09 degK.
	  VCS temperature is stable at 97.81 degK.
 
  	- Science Status - Nominal

	The NICMOS team is busy analyzing lots of recent SMOV calibration
	data.  The part of the 7055 Grism test analyzed to date looks good.
	The 7046 Intflat & Stability Monitor are showing residual flat-field
	structure, at ~ the 10% level, relative to Thermal Vac test data.
	Residuals at these levels were expected.  The data will be used to
	update gain tables.  The latest focus monitoring data show that
	the Camera 3 focus continues to retract in the right direction
	(No specific numbers were discussed at this meeting.)

	ERO data continue to be analyzed.


4.  STIS Status

	- Engineering Status

	Since the last meeting, an anomaly review meeting was held at GSFC to
	go over the current understanding of the CCD voltage anomaly, 
	reported in the minutes of the last meeting, and to decide on the
	near-term CCD operations.  At the meeting, BASD and 680 engineers
	presented the results of their circuit-level analysis and concluded
 	that spurious voltages of day 108 were a result of a partial reset
	cause by a single-event-upset (SEU) to an opto-coupler in the CCD
	Electronics Box while the CCD was in the "Protect" state.  The
	unpredicted voltages seen during the turn-on attempt of day 113
	(April 23) were consistent with tests run on STIS
	and ACS engineering units.  They also concluded that there was no
	immediate danger to the CCD anywhere in the commandable voltage
	range.

	As a result they recommended a re-run of the April 23 turn-on proce-
	dure.  If successful, the CCD would be left on, while operational
	procedures were developed to recover from any subsequent reset.

	Their conclusions and recommendations were accepted with the further
	action that BASD study the signature of such an SEU that might
	occur while the instrument is in the "Operate" state.

	Accordingly, The CCD was successfully turned back on last evening and
	left in the Protect state with the intention of resuming the planned
	SMS timeline today.  (Except for the A/D offsets voltages, which turn
	out to be gain-dependent, all voltages came back up as predicted.)

	The decision to proceed with normal CCD operations in next week's SMS
 	(SMS118) will be made later today pending the results of the further
	BASD analysis of Operate-mode SEU signatures and behaviors.
	(Note:  This afternoon (April 25), the results of this testing were
	communicated from Harry Garner (BASD) to Rodger Doxsey and the
	decision to proceed with the normal SMS was made.)

	The anomaly corrupted the results of last week's 7107 annealing
	procedure and the 7094 CCD Sensitivity Test.  The subsequent CCD
	outage prevented the execution of one iteration of the 7063 UV
	Monitor.  7107 and 7063 are repeated in the normal course of events.
 	7094 will need to be repeated in a future SMS.


5.  FGS status

	    - With the recent completion of the SMOV mini-OFADs (7001, 7023,
		7024) for each FGS and the FGS-to-FGS alignemnts (7025),
		the FGS1R is ready for commissioning as a guider.  To that
		end, an FRR will be held next week to go over analysis 
		results, plans for PDB and on-board table updates (currently
		being worked for inclusion in SMS139), and any other details
		that need to be discussed and agreed to.  Eric Isaacs will
		set up the FRR.

6.  FOC/COSTAR status- The FOC SMOV program is complete.  The SMOV TTRB has
	enabled the resumption of FOC science. 


PLANNING REPORTS

1.  Status of Upcoming SMSs

	- SMS111 - Currently executing.

	- SMS118 - Exists as two alternative SMSs, one with normal
 		   STIS CCD scheduling and one without.  Awaiting results of
 		   today's BASD CCD anomaly analysis to determine which
		   SMS will be executed.  In any case,  7105 MAMA HV turn on
		   will proceed as planned. 

	- SMS125 - The calendar is complete.   This SMS will contain the last
 		   piece of MAMA HV Turn-On (7105) on day 127 (May 7).
		 - Initial Mode products are out for review.
		 - May not need instruction update for "big" bad-pixel table.
		   (Will be worked off-line.)

	- SMS132 - Calendar building is nearly finished.   SARs are expected
		   to go out tonight.

	- SMS139 - Calendar building to begin on Monday.  Will contain
		   regular MAMA operations.

		   
2.  Replans

	STIS

	- MAMA HV Turn-on (7105) is currently planned for SMS118.
	  Downstream MAMA scheduling has been assessed.  According to
	  the latest plan, regular MAMA SMOV operations are to start
	  in the SMS 139.

	NICMOS

	- No significant replans have yet been identified.


OPERATIONS STATUS

1.  OPUS - OPUS is awaiting a software delivery installation that will
	aid in processing STIS MAMA data.

	If necessary, a test for MAMA processing will be performed using 	in-bay Functional data, prior to actual SMOV 7105 execution.
	
	Harry Ferguson will check with Daryl Swade regarding he data missing
	from proposa 7124.
 
2.  Archive - Nominal except for problem stated above.

biagetti@stsci.edu

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