From schuehle@linax2.dnet.gwdg.de Tue Nov 18 16:42:16 2003
Date: Thu, 11 Dec 1997 10:19:32 +0100
From: "LINAX2::SCHUEHLE" <schuehle@linax2.dnet.gwdg.de>
Reply-To: sumer-soft@esa.nascom.nasa.gov
To: sumer-soft@esa.nascom.nasa.gov
Subject: SUMER-SOFT: B-Detector radiometric calibration update


    B-Detector radiometric calibration update
    
    
    The laboratory calibration data of the SUMER B-Detector have now been
    supplemented with inflight results from line ratio measurements below
    80 nm and observations of the Alpha Leo spectrum above 120 nm. A data
    gap between 66 and 88 nm could be filled with good accuracy by
    measurements inside the overlapping range of first and second order and
    the KBr-to-bare ratio.
    Uncertainties are estimated to be 15% from 54 to 120 nm, 25% above 120
    nm on KBr (30% on bare). Below 54 nm only very few lines can be
    observed, and the data need further confirmation and can at this stage
    only be trusted to within a factor 4, but will be improved by future
    measurements.

    Udo Schuehle, 11. Dec. 1997