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Дата изменения: Tue Mar 11 23:59:32 1997
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Поисковые слова: annular solar eclipse
SMOV Status & Planning Meeting Minutes 03/07/97

SMOV Status & Planning Meeting Minutes

Meeting Date: 03/07/97



STATUS REPORTS

1.  Observatory Status

	MOSES status reports:

	- All observatory subsystems are nominal.

2.  WFPC2 Status 
	- Engineering status is nominal.  

	- Science status - nominal.  As reported yesterday, the EROs
 	  were successfully observed and initial processing has
 	  begun.   They inclued a planetary nebula and a pair of
	  colliding galaxies.  They are reported to look good.

	  Note:  Now that the EROs have been performed and the 
	  Cycle 6 science has resumed, WFPC2 will no 	  longer report at this
meeting, except of course
	  in the event of anomalies affecting SMOV or an
	  adverse change in the observed UV/Lyman alpha throughputs.

	
3.  NICMOS Status

	- Engineering status - John Troeltzsch reported that, starting 
	  sometime on Tuesday, NICMOS has been experiencing a 
	  temperature anomaly, which he characterized as a "thermal
	  short".  The innermost dewar surface is rising in tempera-
	  ture faster that expected, while the 2nd innermost dewar
	  surface is dropping in temperature.  As a result the 
	  detector temperatures may equilibrate ~ 1 deg K higher than
	  the thermal vac temperatures while the vapor cooled shield
	  (VCS) may end up cooler than expected (~ 131 vice 151 degK)
	  Rodger Thompson said that these effects can indicate that
	  the nitrogen block has made contact with the front of the
	  nitrogen tank.  He explained that, while the higher detector
 	  temperature may have the beneficial effect of better
	  detector q.e., and the lower VCS temperature will reduce
	  thermal background, the situation may have the effect of
	  reducing overall instrument life by a fraction of a year
	  (~ 0.6 yr.)  There is no obvious correlation with the
 	  completion of the SMOV BEA period or with any other space-
	  craft conditions and there is no reason not to proceed with
	  SMOV as planned.  If the contact opens up after a few
	  months, then the impact on lifetime will be lessened.
	  Analysis will continue, with the main monitors being the
	  detector mounting cup, the VCS temperature, and pressure
	  monitors.

	- Science Status - NICMOS science continues to work the
	  details of flats, darks, and cosmic ray removal.   

	
4.  STIS Status

	- Engineering Status - STIS experienced a problem in reporting
	  data out of SDB to the recorder during data collection for 
	  the Coarse Corrector Alingment Activity (7075).   
	  The problem was traced to a commanding problem 
	  in which the data rate was erroneously set to 4kbs 
	  vice the normal 1Mbs.   As a result
	  the record function shut down too early before all the data 
	  been collected.  This in turn has been traced to scheduling
	  system error which can now be seen in 10 other places in
	  existing SMOV SMSs.  The same problem also recurs in the
	  currently executing SMS at the subsequent visits of the
	  same activity.  A database change (back to the proper 1Mbps
	  rate) will be made to correct the 10 instances in upcoming
	  SMSs.  Art Bradley and Vicki Balzano will work today to
	  devise an operational workaround for salvaging the upcoming
	  visits in the executing SMS.   

	  Science Status - The extent to which last
	  night's data loss degrades the alignment activity will not
	  be known until the PI (George Hartig) looks at all the data
	  later this morning.

5.  FGS status - no new activity

6.  FOC/COSTAR status- no new activity
  

PLANNING REPORTS

1.  Status of Upcoming SMSs

		
   	- SMS065 - Currently executing.

   	- SMS069 - Signed off.

  	- SMS072 - Final Mode products are out for review.

	- SMS076 - Built and under internal review.

	- SMS079 - Built and under internal review.

	- SMS083 - Calendar built and ready for SAR requests.

2.  Replans

	- No new replans 
	- MAMA HV Turn-on (7105) is delayed (from 21 March)for a
 	      minimum of 2 weeks.  Assessment of downstream MAMA
	      scheduling will be assessed.


OPERATIONS STATUS

1.  OPUS
	 - Processing data normally, "repairing" observations where
	   necessary.

2.  Archive - Nominal.


biagetti@stsci.edu

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