RTTOV-9 FREE DOWNLOAD

Help Center Find new research papers in: Unfortunately this is not as simple as it appears because different computing platforms perform differently. Science and Technology Branch. This approach was devised in order to involve all input nodes within the overlapping input and output domains, this being necessary for appropriate Jacobian mapping. RTTOV - the fast radiative transfer model for calculations of radiances for satellite infrared or microwave nadir scanning radiometers see push broom scanner. If the file name appears as tstintavg.

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Any comments on the models or suggestions for improvements should be submitted to the NWP SAF using the nwpsaf metoffice. Important Notices and Disclaimers.

The results from these two sets of routines have been cross-validated for a few sample cases. Some performance statistics are given below in section 5. FASTEM2 computes the surface emissivity averaged over all facets representing the surface of the ocean and an effective path correction factor for the down-welling brightness temperature. You're using an out-of-date version of Internet Explorer. The range of temperatures and water vapour concentrations over which the optical depth computations are valid depends on the training datasets which were used.

RTTOV (radiative transfer code)

Views Read Edit View history. The application and test program performs the following tasks: Retrieved from " https: Surface emissivity model which parameterizes surface emissivity.

The software package will only be downloaded if the box is checked. This is a sample F90 application and testing package on use of a forward interpolator and TL-adjoint pair for interpolation and Jacobian mapping. A fixed surface emissivity of 1 was assumed for all HIRS channels and 0.

An Assessment of Data from the Advanced Technology Microwave Sounder at the Met Office

This important new feature which allows better mapping of computed jacobians on to user levels, is described in more detail below.

Figure 1 clearly demonstrates the improvement obtained in the Jacobians when the weighted average interpolator is used for this case.

This is not the case for a scalar machine like the IBM. There tttov-9 a number of points that can be made from Figure 3.

All documentation and latest updates to the code for all supported versions are available at the website above in the radiative transfer area. From Wikipedia, the free encyclopedia.

Advances in Meteorology

Please read the terms and conditions of the licence agreement for use of this software package. RTTOV contains forwardtangent linearadjoint and K full Jacobian matrices versions of the model; the latter three modules for variational assimilation or retrieval applications.

Transmittance of atmospheric gases in the microwave region: Sample application and testing software. The final Jacobian column on user levels, a channel sensitivity profile, can suffer significant distortion compared to the case where no interpolation has been performed.

Enter the email address you signed up with and we'll email you a reset link. Url of this page: An upper tropospheric humidity data set from operational satellite microwave data.

RTTOV (radiative transfer code) - Wikipedia

More details can be found in the RTTOV-9 users guide and science and validation plan both available on the web site given above. A local version of the modules about which the package was initially developed and which reflects the updates made to the related RTTOV-9 modules is also included. Jacobian mapping between vertical coordinate systems in data assimilation. Science and Technology Branch. Help Center Find new research papers in: Note that only the infrared and microwave channels can be simulated at present.

The main differences are: