The RADTRANS Radiative Transfer Model
Radtrans is a general purpose planetary radiative transfer model for computing
the transmission of atmospheric paths and/or the radiances emitted by
planetary atmospheres. The code is general purpose and not hard-wired to any
specific planet. Radtrans evolved from Genlbl, which was a general purpose
planetary line-by-line model, developed by Dr Simon Calcutt. Radtrans extended
the functionality of this program to also allow the computation of planetary
spectra using both band model approximations and also the correlated-k
approximation. The code has also been extended to incorporate both multiple
scattering and single scattering calculations.
The NEMESIS Correlated-k Retrieval Model
NEMESIS (Non-linear optimal Estimator for MultivariatE spectral
analySIS) is general purpose correlated-k retrieval code developed from the
Radtrans project. Nemesis was originally developed for Cassini/CIRS retrievals,
but was designed from the start to be applicable to any planetary atmosphere.
It has since been applied to analyse the spectra of every planet in our solar
system that has an atmosphere and has also been extended to analyse the spectra
The Radtrans/Nemesis project is continually being developed and extended and is
managed with the 'subversion' program. Follow these links to view the current
manuals for the 2.1 release of Radtrans
and Nemesis .
Scientists interested in running either Nemesis or Radtrans to analyse their
data are very welcome to contact me.
Irwin, P.G.J., N.A. Teanby, R. de Kok, L.N. Fletcher, C.J.A. Howett,
C.C.C. Tsang, C.F. Wilson, S.B. Calcutt, C.A. Nixon, P.D. Parrish,
The NEMESIS planetary atmosphere radiative transfer and retrieval tool,
J. Quant. Spectrosc. and Rad. Trans., 109, 1136-1150, 2008.
Irwin, P. G. J., S. B. Calcutt and F. W. Taylor, Radiative transfer models
for Galileo NIMS studies of the atmosphere of Jupiter. Adv. Space. Res. 19,
No. 8, pp 1149-1158, 1997.
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