Policies for On-Call ESOC Support
                           BAS/EUVE/0082/95
                             18 Sep 1995


To:  CEA Management
From:  B. Stroozas and J. Vallerga
CC:  P. Ringrose, D. Biroscak, C. Jones (file)


   This memo is meant to clarify and amend various ESOC support policies
in preparation for zero shift operations.  It addresses the 20-hour
criterion, the issue of on-call support personnel for the ESOC, and
the response to a payload reconfiguration resulting from an anomalous
situation.

1. 20-Hour Criterion

   The 20-hour criterion remains in effect.  This criterion states that
all detector high voltage units (HV) should be turned off in the event
of either of the following:

 A) The ESOC has not been able to monitor the payload for 20 hours and
    does not expect to in the immediate future.
 B) It is expected that monitoring will not resume for at least 20 hours.

Condition A allows the ACE to keep the payload HV on with the expectation
of a quick fix, while condition B allows the ACE (with Duty Scientist
approval) to shutdown the detectors immediately when it is known that
the problem will take a long time to be fixed.

2. On-Call Personnel

   CEA management has stated that there will be no after-hours or weekend
support for the ESOC from Central or from the Duty Software Engineers; the
ACE (and, via the ACE, the Duty Scientist) will continue to be on-call
during off-shift hours.  If a problem with the ESOC occurs during off-shift
hours that requires software or systems support then the ACE will apply
the 20-hour criterion to the problem in order to determine whether to
shutdown the detectors (upon approval of the Duty Scientist).

3. Instrument Reconfigurations Response

   The main responsibility of the ACE is to respond to and investigate
anomalies, working with the Duty Scientist to verify that the science
instruments are safe.  In the event of the situation where the instruments
are safe, and where the payload instruments require reconfiguration (e.g.,
due to clamup), the ACE will attempt to reconfigure as rapidly as possible.
When proper commanding support is unavailable the ACE, with Duty Scientist
concurrence, may defer reconfiguration until the next business day.