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As a former member of the UMBC Atmospheric Spectroscopy Lab and JCET, I worked on fast radiative transfer models for the NOAA HIRS instruments and retrieval methods for IR remote sensing instruments.
The new HIRS Fast Forward Program (HFFP) is a fast radiative transfer program optimized for HIRS on NOAA-7 to 15. A polychromatic approximation for the transmittances is used to simulate the convolved radiances. Both finite differences and analytical Jacobians are implemented. The HFFP has been created using the pseudo line-by-line code kCARTA. The rms error introduced by the fast model varies from 0.05K to 0.15K depending on the channel. (Reference: T. Wehr, L.L. Strow, S.E. Hannon, J. Joiner, "A new fast radiative transfer model for HIRS", in Optical Remote Sensing of the Atmosphere, OSA Technical Digest, Optical Society of America, Washington DC, 1999, pp. 43-45.)Until January 1997, I was a research associate
at the Institute of Remote Sensing and the
Institute
of Environmental Physics at the University of Bremen in
Germany. I worked on radiative transfer algorithms and retrieval of
atmospheric parameters from passive microwave remote sensing instruments.
Since November 1998, I am working in the Atmospheric Unit of the
Earth Sciences Division at ESA
on the preparation of future Earth observation missions on
Envisat
and the
Earth Explorer Missions.
European Space Agency
ESTEC SCI-VRA
Keplerlaan 1, P.O. Box 299
2200 AG Noordwijk ZH, The Netherlands
Phone: +31 71 565 5753, Fax: +31 71 565 5675
E-Mail: twehr@estec.esa.nl
background picture: UMBC library