SMOV STATUS & PLANNING MEETING -  9 APR. 97



NOTE:  The next meeting is April 11, 8:30 AM.


STATUS REPORTS

1.  Observatory Status - All systems nominal.

	Battery 6 reconditioning is proceeding nominally with the
	discharge cycle complete.
	
2.  WFPC2 Status - Proceeding nominally with Cycle 6 science and
	remaining SMOV monitors.  
  

3.  NICMOS Status

	- Engineering Status - 

	The NICMOS Dewar heaters suffered three more SAA-induced 
	thermal set point corruptions (two on April 7 and one on
	April 8),  The dewar heaters were commanded back off by the
	STOCC per procedure.

	The Detector temperature (mounting cups) is 61.0 degK, warming
	at a rate of +0.02 degK/day.

	The cold well (ice) temperature is 60.0 degK, warming at a rate
	of +0.02 degK/day.

	The VCS temperature is 98.5 degK. warming at a rate of +0.08
	degK/day.  On April 3 (093) the VCS started warming
	up, but now appears to be stabilizing close to its current
	temperature.

	The cryogen venting had stabilized but now appears to be slightly
	increasing again at a rate of ~ 156 grams/day.   NICMOS has to date
	lost an estimated total of 4% of its cryogen.

  	- Science Status - 7150 Focus monitor phase retrieval analysis
	(Burrows, et al.) indicates no additional longitudinal shift
	in focus positions.  There are some small lateral shifts.

	EROs 7116 (Arp220) and 7117 (M16) continue to be analyzed.
	The Team is developing tools for data processing of individual
	exposures and for updating pipeline inputs.  

	The 7034 Field Offset Mechanism (FOM) test was executed during the
	night.  It appeared to go nominally, though data analysis has not
	yet begun.


4.  STIS Status

	- Engineering Status - Nominal.

	- Science Status - Nominal.  Analysis of the 7067 CCD target
	acquisition test (3rd iteration) is ongoing.  Like the second
	iteration (as reported in the notes of 2 April), it was successful
	in acquiring the target but the offset needed to go from
        a filtered aperture to an unfiltered slit was not applied by the
	on board algorithm.
  
	Recents darks indicate that the warm-up resulting from last week's
	Safemode "cleaned up" the hot pixels in the CCD.

	The UV Monitor (7063) continues to indicate no loss in throughput,
	although an apparent decline at the red end has been seen and is not
	yet understood.

	Vicki Balzano reported that, two days ago, it was discovered that
	some PDB Symbol of Interest Files (SOIF) are incorrect, i.e, there
	is a mismatch between memory locations specified by the SOIF and
	the actual on-board memory locations.   A Code 512
	analysis has since narrowed the problem down to two flight software
	changes made last year (while still under BASD control, prior 
	to 512 FSW control) for which the proper SOIF updates were not 
	made.  This resulted in a misplacement of 25 onboard tables.
	Planned corrective actions are for a reload of the memory in the
 	SMS111, adding an appropriate offset to each of the SOIF locations.
 	Then the SOIF files will be corrected in a later PDB release.
 
5.  FGS status - No new activities.

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

	- SMS097 - Currenly executing.

		 - (Note:  While composing these notes (afternoon of 
		   9 April), I got word that HST has entered safemode.)
		   No details yet available, but the SMOV activities and
	 	   EROs scheduled over the next couple of days are obviously
		   impacted.)

	- SMS104 - Final Mode products are expected to be available
 		   tomorrow.  Gaps for FSW configuration opportunities
		   related to MAMA SAA-avoidance management are on days 105
		   and 110.

		 - The CCD annealing proposal (7107) goes in this SMS.

		 - A PDB update involving the downlink transmission delay
 		   parameter is in the hands of the PDB office, which
		   apparently is awaiting freeze board approval of the
		   change.

		 - Some edits have been made to manage the NICMOS dewar 
		   heater set point through SAA-impacted orbits.  The edits
		   will result in the refreshing/resetting of the heater
		   set point after every SAA passage.  This will be

	- SMS111 - Currently being built.  There is a "slight
 		   possibility" for the the MAMA turn-on (7105 revised) in
		   this SMS.
  
	- SMS118 - Building has started.  May include the bulk of
		   the MAMA turn on sequence (7105).

2.  Replans

	STIS

	- MAMA HV Turn-on (7105) is currently planned for SMS111 or
		SMS118.  Downstream MAMA scheduling is being assessed.

	NICMOS

	- No significant replans have yet been identified.


OPERATIONS STATUS

1.  OPUS - Nominal.  No new problems.  Fixes for previously reported
	problems are coming in.

2.  Archive - Nominal.  

biagetti@stsci.edu

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