From wilhelm@linax2.mpae.gwdg.de Tue Nov 18 16:44:27 2003
Date: Fri, 7 May 1999 12:01:19 +0100
From: wilhelm@linax2.mpae.gwdg.de
Reply-To: sumer-soft@esa.nascom.nasa.gov
To: sumer-soft@esa.nascom.nasa.gov
Subject: SUMER-SOFT: Correction of Recent SUMER Calibration (Detector B)

Subject: SUMER Radiometric Calibration (recent calibration of detector B)

Dear colleagues,

in my last message, I informed you that we had produced an update of the SUMER
calibration. Unfortunately, there was a misunderstanding between Udo Schuehle
and me on how to take the 17% sensitivity reduction for detector B into account.
This reduction is nothing new and has resulted from an operation of this
detector at low gain since late in 1996. It had adequately been worked into
the calibration of detector B until the most recent modification in April 1999.
We have now provided corrected restore files CAL_B_*_5_99.rst. Should you have
used the detector B radiometry with the recent calibration in the last two
weeks, I am afraid you have to re-do this work. I am sorry for this
inconvenience.   
  
With best regards,
Klaus Wilhelm