Efficient radiative transfer simulations for a broadband infrared radiometer - Combining a weighted mean of representative frequencies approach with frequency selection by simulated annealing
Artikel i vetenskaplig tidskrift, 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


Radiative transfer


Correlated k

Weighted mean of representative frequencies

Atmospheric radiative transfer simulator



S.A. Buehler

Lulea tekniska Universitet

V.O. John

Met Office

A Kottayil

Lulea tekniska Universitet

M. Milz

Lulea tekniska Universitet

Patrick Eriksson

Chalmers, Institutionen för radio- och rymdvetenskap, Global miljömätteknik och modellering

Journal of Quantitative Spectroscopy and Radiative Transfer

0022-4073 (ISSN)

Vol. 111 602-615


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