REFERENCE FORWARD MODEL

Introduction

The RFM is a GENLN2-based line-by-line radiative transfer model originally developed at
AOPP, Oxford University, under an ESA contract to provide reference spectral calculations for the Envisat/MIPAS instrument. It subsequently developed into a general purpose code suitable for a variety of different spectroscopic calculations.

The original code was written in FORTRAN77 and this will continue to be maintained for the time being with various bug-fixes but no new features. The latest version of this is v4.36 (01JUL17). All future development is in RFM v5, which is a complete rewrite in FORTRAN90 and compatible with HITRAN 2016.

RFM maintenance and development is currently supported by the UK National Centre for Earth Observation (NCEO).

The main design features are

I'll consider adding other features that people would find useful, including combinations of features which are currently not allowed. Just let me know, along with any bug-reports.

To get a copy, email me with a brief statement on what you're planning on using it for and I'll email you the source code.

Anu Dudhia ( anu.dudhia@physics.ox.ac.uk )

Spectroscopic Data

The RFM is designed to use the three main types of HITRAN spectroscopic data There are additional HITRAN data sets such as HITEMP (line data) and UV (cross-section data) which can be used, with some care.

GEISA is an alternative to HITRAN, providing similar line and cross-section data but in a different format. While the RFM cannot use GEISA data directly, local software is available to convert these to HITRAN format.

Things the RFM can handle...

(Not all of these are compatible - see
User's Manual for the full list of 'flags').

Things the RFM can't handle...

Publications

If you publish anything involving the RFM in the scientific literature I do not expect to be a co-author, or even consulted. However, I would appreciate it if you sent me a reference for the final publication since it helps me obtain funding for RFM support.

If you want to cite the RFM, the following is recommended:

Dudhia, A
The Reference Forward Model (RFM)
Journal of Quantitative Spectroscopy and Radiative Transfer
186 (2017) 243–253
doi:10.1016/j.jqsrt.2016.06.018

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