From SCHUEHLE@sumop1.nascom.nasa.gov Tue Nov 18 16:41:26 2003
Date: Mon, 17 Mar 1997 14:01:11 GMT
From: SCHUEHLE@sumop1.nascom.nasa.gov
Reply-To: sumer-soft@esa.nascom.nasa.gov
To: sumer-soft@esa.nascom.nasa.gov
Cc: SCHUEHLE@sumop1.nascom.nasa.gov
Subject: SUMER-SOFT: Total number of counts of UDP


      Dear SUMER observer,
      
      Due to the fact that the total number of counts for the detectors are
      expected to be limited to approximately 2x10^11 counts, after which the
      high voltage can no longer be adjusted, we want to make sure that we
      share this resource in a fair way.  For this reason, thanks to the work
      of Dietmar Germerott, the simulator for SUMER UDPs has been upgraded
      with a feature which determines the total number of counts that a study
      will accumulate during the run.  This information is now included in
      the "*.log"-file created at the end of the simulation.
      It will be needed to prevent that programmes are being
      created and run which exceed the total number of counts that we can
      allocate to an average observational study.  When the limit of 1x10^9
      counts is reached a warning is expressed, and at 5x10^9 counts the
      approval by a SUMER operator will be required.
      We expect that this situation may happen when your program is running
      for long periods of time at intense lines or the Lyman continuum.  Most
      of the programs used so far would have no problems with this
      restriction.

      Udo Schuehle, GSFC, 17. March 1997