RTTOV v12.1 was released in February 2017. The package may be obtained by adding RTTOV to your list of software preferences once you have registered and logged in.

Coefficients, emissivity and BRDF atlas data files are available separately on the RTTOV downloads page.

Frequently asked questions are asked and answered here.

Please look at the list of known bugs as the official release package does not contain any updates or fixes listed there.

Requirements for RTTOV v12

  • Computer running Linux/Unix or Apple Mac OS X
  • Fortran 90 compiler (e.g. gfortran)
  • gzip compression utility
  • GNU make utility
  • 500+ MB free disk space required for full install (including bundled coefficients and test and reference data). Additional space is required for larger coefficient files that are not included with the RTTOV package.
  • Optionally RTTOV can be compiled against the HDF5 library (v1.8.8 or later) to make use of all available functionality

Installing RTTOV v12.1

To compile RTTOV v12.1, create a new directory for the package. For example:

$ mkdir ~user/rttov12
$ cd ~user/rttov12

Copy the compressed RTTOV package file (rttov121.tar.gz or rttov121.tar.xz) into this new top-level directory and extract the contents, for example:

$ tar xf rttov121.tar.gz

RTTOV can be compiled without any external dependencies. However to make use of all functionality you should edit the file build/Makefile.local with the location of your HDF5 installation before compiling.

RTTOV v12.1 can be compiled using an interactive script:

$ cd src
$ ../build/rttov_compile.sh

Alternatively you can compile manually as for v11: see the user guide for details.

RTTOV v12 code updates and known issues can be found here.