SSM/I 1D-Var code, originally developed at ECMWF, has been further developed to process data from the SSMIS microwave imager/sounder and from AMSU. It is a standalone package, designed for retrievals of temperature, water vapour, surface wind speed and cloud liquid water from microwave radiance measurements. The various components of the state vector can be configured by the user.
Version 2 of the SSMIS 1D-Var was released in May 2002 and is available to licensed users free of charge. To become a licensed user of the SSMIS 1D-var code, v2, please register on this site first and access the downloads via your user area.