{"id":365,"date":"2023-08-02T14:36:45","date_gmt":"2023-08-02T14:36:45","guid":{"rendered":"https:\/\/itwg.ssec.wisc.edu\/rtsp\/?page_id=365"},"modified":"2023-08-02T15:39:42","modified_gmt":"2023-08-02T15:39:42","slug":"fastrt","status":"publish","type":"page","link":"https:\/\/itwg.ssec.wisc.edu\/rtsp\/fastrt\/","title":{"rendered":"Fast radiative transfer models"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Guidance for fast radiative transfer model developments<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Guidance on developing and testing tangent linear and adjoint code\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/itwg.ssec.wisc.edu\/rtsp\/wp-content\/uploads\/sites\/7\/2023\/07\/README.pdf\" data-type=\"attachment\" data-id=\"370\"><strong>Read Me file<\/strong><\/a>\u00a0(PDF) &#8212;\u00a0<strong>Please read this PDF first<\/strong><\/li>\n\n\n\n<li><a href=\"https:\/\/itwg.ssec.wisc.edu\/rtsp\/wp-content\/uploads\/sites\/7\/2023\/07\/Forward_Lectures.pdf\" data-type=\"attachment\" data-id=\"369\">Optical Path Transmittance: OPTRAN. Forward and Adjoint Modeling<\/a>\u00a0(PDF)<\/li>\n\n\n\n<li><a href=\"https:\/\/itwg.ssec.wisc.edu\/rtsp\/wp-content\/uploads\/sites\/7\/2023\/07\/TL_Lectures.pdf\" data-type=\"attachment\" data-id=\"368\">Tangent Linear Coding<\/a>\u00a0(PDF)<\/li>\n\n\n\n<li><a href=\"https:\/\/itwg.ssec.wisc.edu\/rtsp\/wp-content\/uploads\/sites\/7\/2023\/07\/AD_Lectures.pdf\" data-type=\"attachment\" data-id=\"367\">Adjoint Coding<\/a>\u00a0(PDF)<\/li>\n\n\n\n<li><a href=\"https:\/\/itwg.ssec.wisc.edu\/rtsp\/wp-content\/uploads\/sites\/7\/2023\/07\/K_Lectures.pdf\" data-type=\"attachment\" data-id=\"366\">Jacobian (or K) Coding<\/a>\u00a0(PDF)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Advances in fast radiative transfer models for scattering atmospheres<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Optical Property Databases for Clouds<\/strong>\u00a0(non-spherical implied)\n<ul class=\"wp-block-list\">\n<li><a href=\"http:\/\/www.ssec.wisc.edu\/~baum\/Cirrus\/IceCloudModels.html\" target=\"_blank\" rel=\"noreferrer noopener\">Bryan Baum&#8217;s<\/a>&nbsp;data. Ice clouds; Infrared only; specific instruments; a subset of Ping Yang&#8217;s data.<\/li>\n\n\n\n<li><a href=\"http:\/\/cirrus.met.fsu.edu\/research\/scatdb.html\" target=\"_blank\" rel=\"noreferrer noopener\">Guosheng Liu&#8217;s<\/a>&nbsp;data. Microwave only.<\/li>\n\n\n\n<li>Ping Yang&#8217;s data. Infrared only. Delivered to JCSDA and available on request from&nbsp;<a href=\"mailto:Fuzhong.Weng@noaa.gov?subject=JCSDA%20Cloud%20Optical%20Property%20Database\">Fuzhong Weng<\/a><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Optical Property Databases for Aerosols<\/strong>\n<ul class=\"wp-block-list\">\n<li>Ping Yang&#8217;s data. Infrared only. Delivered to JCSDA and available on request from&nbsp;<a href=\"mailto:Fuzhong.Weng@noaa.gov?subject=JCSDA%20Aerosol%20Optical%20Property%20Database\">Fuzhong Weng<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Fast model status summary<\/h2>\n\n\n\n<p>See also the\u00a0<a href=\"https:\/\/itwg.ssec.wisc.edu\/rtsp\/fast-status\/\" data-type=\"page\" data-id=\"372\">full summaries of model features and development status<\/a>\u00a0provided by the model developers and updated after each ITSC by the RTSP working group.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><th>Model<\/th><th>Supported sensors<\/th><th>Contact<\/th><th>Website<\/th><\/tr><tr><td>RTTOV<\/td><td>Multi-sensor *<\/td><td>Roger Saunders (UKMO)<\/td><td><a href=\"http:\/\/www.metoffice.com\/research\/interproj\/nwpsaf\/rtm\/\">Eumetsat NWP SAF website<\/a><\/td><\/tr><tr><td>CRTM<\/td><td>Multi-sensor *<\/td><td>Paul van Delst (NESDIS)<\/td><td><a href=\"http:\/\/www.ssec.wisc.edu\/~paulv\/Fortran90\/CRTM\/Developmental\/\">Paul van Delst&#8217;s web documentation<\/a><\/td><\/tr><tr><td>MSCFAST<\/td><td>HIRS,GOES,AIRS<\/td><td>Louis Garand (MSC)<\/td><td><a href=\"http:\/\/collaboration.cmc.ec.gc.ca\/science\/arma\/intercomparison\/desc_aesfast2.txt\">more details<\/a><\/td><\/tr><tr><td>OSS<\/td><td>AIRS<\/td><td>Jean-Luc Moncet (AER)<\/td><td><\/td><\/tr><tr><td>SARTA<\/td><td>AIRS<\/td><td>Scott Hannon (UMBC)<\/td><td><a href=\"http:\/\/asl.umbc.edu\/pub\/packages\/sarta.html\">SARTA website<\/a><\/td><\/tr><tr><td>PFAAST<\/td><td><\/td><td>Hal Woolf (CIMSS)<\/td><td><\/td><\/tr><tr><td>Gastropod<\/td><td>AIRS<\/td><td>Vanessa Sherlock (NIWA)<\/td><td><a href=\"http:\/\/gastro.sf.net\/\">Gastropod website<\/a><\/td><\/tr><tr><td>PCRTM<\/td><td>AIRS,IASI,NAST-I<\/td><td>Xu Liu (NASA)<\/td><td><\/td><\/tr><tr><td>RTIASI<\/td><td>IASI<\/td><td>Marco Matricardi (ECMWF)<\/td><td><\/td><\/tr><tr><td>LMD fast models<\/td><td><\/td><td>Alain Chedin\/Noelle Scott (LMD)<\/td><td><\/td><\/tr><tr><td>Zeeman model<\/td><td>SSMIS<\/td><td>Yong Han (NESDIS)<\/td><td><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>* see full summary for list of supported sensors<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Utility Software<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>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:<br><a href=\"http:\/\/exp-studies.tor.ec.gc.ca\/e\/paper_data\/tstintavg_e.html\">http:\/\/exp-studies.tor.ec.gc.ca\/e\/paper_data\/tstintavg_e.html<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/itwg.ssec.wisc.edu\/rtsp\/profile-utility-introduction\/\" data-type=\"page\" data-id=\"375\" target=\"_blank\" rel=\"noreferrer noopener\">Profile_Utility webpage\u00a0<\/a>containing Fortran95 code and documentation to perform units conversions and level-to-layer conversions on atmospheric quantities (Forward models only).<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Guidance for fast radiative transfer model developments Advances in fast radiative transfer models for scattering atmospheres Fast model status summary See also the\u00a0full summaries of model features and development status\u00a0provided by the model developers and updated after each ITSC by the RTSP working group. Model Supported sensors Contact Website RTTOV Multi-sensor * Roger Saunders (UKMO) [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-365","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/itwg.ssec.wisc.edu\/rtsp\/wp-json\/wp\/v2\/pages\/365","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itwg.ssec.wisc.edu\/rtsp\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/itwg.ssec.wisc.edu\/rtsp\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/itwg.ssec.wisc.edu\/rtsp\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/itwg.ssec.wisc.edu\/rtsp\/wp-json\/wp\/v2\/comments?post=365"}],"version-history":[{"count":2,"href":"https:\/\/itwg.ssec.wisc.edu\/rtsp\/wp-json\/wp\/v2\/pages\/365\/revisions"}],"predecessor-version":[{"id":381,"href":"https:\/\/itwg.ssec.wisc.edu\/rtsp\/wp-json\/wp\/v2\/pages\/365\/revisions\/381"}],"wp:attachment":[{"href":"https:\/\/itwg.ssec.wisc.edu\/rtsp\/wp-json\/wp\/v2\/media?parent=365"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}