From WILHELM@sumop1.nascom.nasa.gov Tue Nov 18 16:43:25 2003
Date: Thu, 3 Dec 1998 21:09:03 GMT
From: WILHELM@sumop1.nascom.nasa.gov
Reply-To: sumer-soft@esa.nascom.nasa.gov
To: sumer-soft@esa.nascom.nasa.gov
Cc: WILHELM@sumop1.nascom.nasa.gov
Subject: SUMER-SOFT: SUMER Radiometry

Subject: SUMER Radiometry Programme

Dear colleagues,

there are some more developments with respect to the SUMER radiometry
programme. I have taken out some of the procedures defined inside
the programme and established them as independent procedures.
The main reason was that the magnification programme is useful as a
separate procedure. The change should not have any effect on the 
use of "radiometry.pro", but makes "magnification.pro" available in exactly
the form as in the flight software.  

I mentioned some time ago that a smoothing problem interfered 
with the calibration near 1548 Angstroem (the wavelength
of the C IV line). We still have not re-assessed the sensitivity of
the detectors at long wavelengths. As you know we had hoped to 
look at alpha Leonis and rho Leonis in August this year to get more
star data. Now, without this input, it seems at least to be appropriate 
to eliminate the mathematical problem. Consequently, the programme calls 
a new restore file A_KBR_1ST.RST, which was produced with a different
interpolation method. The new sensitivity gives intensities of up to
29% higher in the range near C IV and thus reduces the discrepancy
with SUSIM substantially, but not completely. Work in this area will
continue.
The old restore file A_KBR_1ST_OLD.RST is still
available. If you want to use it, you have to copy "radiometry.pro"
and edit it by changing "concat_dir(dir,'a_kbr_1st.rst')" to 
"concat_dir(dir,'a_kbr_1st_old.rst')".  


With best regards,
Klaus Wilhelm