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ITWG RTSP home page

• Profile datasets
• Instrument characteristics
• Line-by-line models and spectroscopic databases
• Fast RT models
• Surface property models
• Model intercomparisons
• Validation datasets

Fast radiative transfer models

Guidance for fast radiative transfer model developments

• Guidance on developing and testing tangent linear and adjoint code
The lecture materials below are courtesy of Tom Kleespies.
• Read Me file (PDF) -- Please read this PDF first
• Optical Path Transmittance: OPTRAN. Forward and Adjoint Modeling (PDF)
• Tangent Linear Coding (PDF)
• Adjoint Coding (PDF)
• Jacobian (or K) Coding (PDF)

Advances in fast radiative transfer models for scattering atmospheres

• Optical Property Databases for Clouds (non-spherical implied)
  • Bryan Baum's data. Ice clouds; Infrared only; specific instruments; a subset of Ping Yang's data.
  • Guosheng Liu's data. Microwave only.
  • Ping Yang's data. Infrared only. Delivered to JCSDA and available on request from Fuzhong Weng
• Optical Property Databases for Aerosols
  • Ping Yang's data. Infrared only. Delivered to JCSDA and available on request from Fuzhong Weng

Fast model status summary

Follow model-name links to access full summaries of model features and development status provided by the model developers and updated after each ITSC by the RTSP working group.

Utility Software

• Software for interpolating profiles and mapping of Jacobians from the fast RT layering to NWP vertical coordinates (TL/AD/Gradient) is now part of RTTOV-9. A stand-alone version of the software is available at:
  http://exp-studies.tor.ec.gc.ca/e/paper_data/tstintavg_e.html
  
• Profile_Utility webpage containing Fortran95 code and documentation to perform units conversions and level-to-layer conversions on atmospheric quantities (Forward models only).