Efficient radiative transfer simulations for a broadband infrared radiometer - Combining a weighted mean of representative frequencies approach with frequency selection by simulated annealing
Journal article, 2010
We present a method to efficiently simulate the measurements of a broadband infrared instrument. The High Resolution Infrared Radiation Sounder (HIRS) instrument is used as example to illustrate the method. The method uses two basic ideas. Firstly, the channel radiance can be approximated by a weighted mean of the radiance at some representative frequencies, where the weights can be determined by linear regression. Secondly, a near-optimal set of representative frequencies can be found by simulated annealing.
The paper does not only describe and analyze the method, it also describes how the method was used to derive optimized frequency grids for the HIRS instruments on the satellites TIROS N, NOAA 6-19, and Metop A. The grids and weights as well as the optimization algorithm itself are openly available under a GNU public license.
Simulated annealing
Frequency selection
High resolution infrared radiation sounder
Thermal infrared
ARTS
Radiative transfer
WMRF
Correlated k
Weighted mean of representative frequencies
Atmospheric radiative transfer simulator
HIRS
Author
S.A. Buehler
Lulea tekniska Universitet
V.O. John
Met Office
A Kottayil
Lulea tekniska Universitet
M. Milz
Lulea tekniska Universitet
Patrick Eriksson
Chalmers, Department of Radio and Space Science, Global Environmental Measurements and Modelling
Journal of Quantitative Spectroscopy and Radiative Transfer
0022-4073 (ISSN)
Vol. 111 4 602-615Subject Categories (SSIF 2011)
Other Environmental Engineering
DOI
10.1016/j.jqsrt.2009.10.018