Fast radiative transfer model status summaries
At each ITSC fast RT model developers are invited to provide a status summary of their model to the RTSP-WG co-chairs. The material provided is posted here.
Latest official release: Version 9.x
Contact: Roger Saunders
Code access: NWP SAF
On completion of the RTTOV-9 request form, ECMWF will give access to the code by FTP. Alternatively it is available on a CD which includes all the AIRS/IASI large coefficient files (not on the FTP file).
License requirements:Terms and conditions for use of RTTOV-9
Language: Fortran 90
Supported sensors: IASI, (A)TOVS, AVHRR, SSMI/SSMIS, VTPR, TMI, AIRS, HSB, MODIS, ATSR, AMSR, GOES Imager/Sounder, MVIRI/SEVERI, GMS/MTSAT imager, FY2-VISSR, FY1-MVISR, WINDSAT
Developers comments: The documentation for RTTOV-9 and large coefficient files are also available on the RTTOV-9 web site. The main differences/upgrades from RTTOV-8 are listed at in the RTTOV-9 plan overview, and also in more detail in the RTTOV-9 users guide.
Information last updated: April 2008
Community Radiative Transfer Model (CRTM)
Latest official release: v1.1
Contact Yong Han
Code access via ftp
License requirements: None as yet.
Language: Fortran95
Supported sensors: ABI GOES-R (spec), AIRS Aqua, AVHRR/2 TIROS-N, AVHRR/2 NOAA-06, AVHRR/2 NOAA-07, AVHRR/2 NOAA-08, AVHRR/2 NOAA-09, AVHRR/2 NOAA-10, AVHRR/2 NOAA-11, AVHRR/2 NOAA-12, AVHRR/2 NOAA-14, AVHRR/3 NOAA-15, AVHRR/3 NOAA-16, AVHRR/3 NOAA-17, AVHRR/3 NOAA-18, AVHRR/3 MetOp-A, HIRS/2 TIROS-N, HIRS/2 NOAA-06, HIRS/2 NOAA-07, HIRS/2 NOAA-08, HIRS/2 NOAA-09, HIRS/2 NOAA-10, HIRS/2 NOAA-11, HIRS/2 NOAA-12, HIRS/2 NOAA-14, HIRS/3 NOAA-15, HIRS/3 NOAA-16, HIRS/3 NOAA-17, HIRS/4 NOAA-18, HIRS/4 MetOp-A, IASI MetOp-A, IMGR GOES-08, IMGR GOES-09, IMGR GOES-10, IMGR GOES-11, IMGR GOES-12, IMGR GOES-13, IMGR MT1R, MODIS Aqua, MODIS Terra, SEVIRI MeteoSat-08, SEVIRI MeteoSat-09, SEVIRI MeteoSat-10, SNDR GOES-08, SNDR GOES-09, SNDR GOES-10, SNDR GOES-11, SNDR GOES-12, SNDR GOES-13, SSU TIROS-N, SSU NOAA-06, SSU NOAA-07, SSU NOAA-08, SSU NOAA-09, SSU NOAA-11, SSU NOAA-14, VISSR(DetA) GMS-5, AMSR-E Aqua, AMSU-A Aqua, AMSU-A MetOp-A, AMSU-A MetOp-B, AMSU-A MetOp-C, AMSU-A NOAA-15, AMSU-A NOAA-16, AMSU-A NOAA-17, AMSU-A NOAA-18, AMSU-A NOAA-19, AMSU-B NOAA-15, AMSU-B NOAA-16, AMSU-B NOAA-17, ATMS NOAA-C1 (spec), HSB Aqua, MHS MetOp-A, MHS MetOp-B, MHS MetOp-C, MHS NOAA-18, MHS NOAA-19, MSU TIROS-N, MSU NOAA-06, MSU NOAA-07, MSU NOAA-08, MSU NOAA-09, MSU NOAA-10, MSU NOAA-11, MSU NOAA-12, MSU NOAA-14, SSM/I DMSP-08, SSM/I DMSP-10, SSM/I DMSP-11, SSM/I DMSP-13, SSM/I DMSP-14, SSM/I DMSP-15, SSMIS DMSP-16, SSM/T-1 DMSP-13, SSM/T-1 DMSP-15, SSM/T-2 DMSP-14, SSM/T-2 DMSP-15, WindSat Coriolis
Developers comments:
CompactOPTRAN used for transmittance generation. ADA used for radiative transfer.
Information last updated: April 2008
Latest official release: v1.0
Contact: Yong Han
Code access: CRTM_SSMIS_UAS.tar.gz tarball
License requirements: None as yet.
Language: Fortran95
Supported sensors: SSMIS DMSP-16
Developers comments: none
Information last updated: April 2008
Latest official release:
Contact: Louis Garand
Code access: License requirements
Language:
Supported sensors: HIRS, GOES, AIRS
Developers comments:
No new development. Used for assimilation of GOES-10 and 12 water vapor channel radiances at MSC and for retrievals of surface skin temperature.
Information last updated: May 2005
Latest official release: Version 1
Contact: Jean-Luc Moncet
Code access:
License requirements:
Language:
Supported sensors: AIRS
Developers comments:
Version 1 released and implemented in CRTM. Validation in scattering atmospheres is on-going. Development/testing of first accelerated version with multi-channel training should be completed for the fall of 2005.
Information last updated: May 2005
Stand-Alone AIRS Radiative Transfer Algorithm (SARTA)
Latest official release: Version 1.05
Contact:Scott Hannon (UMBC)
Code access:
License requirements:
Language:
Supported sensors: AIRS
Developers comments:
Version 1.05 of the Stand-alone AIRS Radiative Transfer Algorithm, SARTA, was released in December 2004 and uses the January 2004 coefficient database. It is a clear air fast forward model with variable H2O, O3, CO, CH4, and CO2 (no Jacobian capability), and is based on HITRAN 2000 spectroscopic database and MTCKD v1.0 water continuum, with some tuning to match validation observations. This implementation of the AIRS-RTA is used in the DAAC version 4 processing and is available online: http://asl.umbc.edu/pub/packages/. Work continues on development of the AIRS-RTA algorithm. Several new features and improvements will be implemented for the next official release (December 2005).
Information last updated: May 2005
Latest official release:
Contact: Hal Woolf (CIMSS)
Code access:
License requirements:
Language:
Supported sensors:
Developers comments:
No change to code. Line-by-line data used to train the scheme were updated to LBLRTM-8.4, HITRAN-2000, AER 1.1 updates and UMBC-49. The training set includes an “ultra-cold” atmosphere.
Information last updated: May 2005
Latest official release: Version 0.3.0
Contact: Vanessa Sherlock (NIWA)
Code access: http://gastro.sf.net
License requirements: Free Software LGPL
Language: Fortran 90
Supported sensors: AIRS
Developers comments:
The current distribution (version 0.3.0) comprises:
* forward and gradient (tangent linear, adjoint, Jacobian) routines for radiative transfer in a plane-parallel atmosphere of non-scattering gaseous absorbers in local thermodynamic equilibrium, with specular reflection at the Earth's surface.
* a validated gaseous absorption regression model for the Atmospheric Infrared Sounder, AIRS derived from the UMBC pre-launch and post-launch convolved transmittance databases (generated using kCARTA)
o prediction of effective optical depth on a fixed pressure grid (101 levels) based on layer mean temperature and water vapour and ozone VMRs
* AIRS fast radiative transfer model wrapper codes with a flexible input interface enabling:
o runtime specification of input profile units (mass and volume mixing ratios with respect to total and dry air) and the AIRS ISRF,
o profile input and Jacobian output on user-defined pressure levels,
o radiative transfer calculations for user-specified channel subsets.
* code to interface Gastropod with the Met Office 1D-Var (v3) retrieval software distributed by the Eumetsat NWP SAF.
Code (tarballs, CVS repository) and coefficients are available online at
http://gastro.sf.net.
Journal publications:
V. Sherlock, A. Collard, S. Hannon, R. Saunders, The Gastropod fast radiative
transfer model for advanced infrared sounders and characterization of its errors for radiance assimilation, Journal of Applied Meteorology, 42, 1731-1747, 2003.
Information last updated: May 2005
Principal Component-based Radiative Transfer Model
Latest official release: Version 1.0
Contact: Xu Liu (NASA)
Code access:
License requirements:
Language: Fortran 90
Supported sensors:AIRS, IASI, NAST-I
Developers comments:
Principal Component based Radiative Transfer Model. Version 1.0 completed. Features include Principal Component (PC) scores and analytical Jacobians of PC scores with respect to state vectors. Scattering not included. Variable gases are currently H2O and O3. Trained with LBLRTM using HITRAN-2000 spectroscopy. The vertical pressure grid has 101 levels. Journal publications: Xu Liu, William L. Smith, Daniel K. Zhou and Allen Larar, Principal component-based radiative transfer model for hyperspectral sensors: theoretical concept, Applied Optics, 45(1), 201-209, 2006
Information last updated: March 2006
Latest official release: Version 5
Contact: marco.matricardi@ecmwf.int
Code access:
License requirements:
Language:
Supported sensors:
Developers comments:
In RTIASI-5 the integration of the RT equation is done on 90 levels using the linear in tau approximation to parameterise the Planck function. H2O, O3, CO2, N2O, CH4 and CO and treated as profile variables. Solar radiation is included in the interval 2000-2760 cm-1 assuming Lambertian reflectance for land surfaces, and explicit calculation of bidirectional reflectance over sea. RTIASI-5 includes a parameterization of multiple scattering and absorption for water clouds (5 classes) cirrus clouds (9 classes) and aerosols (10 classes). Work is ongoing to develop an emissivity model for a land/sea-ice/snow surface.
Information last updated: May 2005
Latest official release:
Contact: Alain Chedin/Noelle Scott (LMD)
Code access:
License requirements:
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Supported sensors:
Developers comments:
Information last updated: May 2005