Current version:<\/strong> v4.0, October 2022 The Pencil Beam Wind Processor (PenWP) is a software package written mainly in Fortran 90 for handling data from the SeaWinds (on QuikSCAT or ADEOS-II), OSCAT (on Oceansat-2 and ScatSat-1), HSCAT (on HY-2A, HY-2B, HY-2c, and HY-2D) and RapidScat (on the International Space Station) scatterometer instruments.<\/p>\n PenWP is intended to be a generic wind processor for Ku<\/em>-band pencil beam scatterometer data.<\/p>\n It will be adapted to handle data from future instruments like the OSCAT successor on Oceansat-3<\/strong> (from ISRO) once they become available.<\/p>\n PenWP generates surface winds based on pencil beam radar backscatter data. It allows performing the ambiguity removal with the Two-dimensional Variational Ambiguity Removal (2DVAR) method and it supports the Multiple Solution Scheme (MSS).<\/p>\n The output of PenWP consists of wind vectors which represent surface winds within the ground swath of the scatterometer.<\/p>\n Input of PenWP is Normalized Radar Cross Section (NRCS) data (in BUFR<\/a> format – conversion tools from HDF5 are provided in the package). Output is written using the SeaWinds BUFR template or the KNMI BUFR template with generic wind section.<\/p>\n Apart from the scatterometer input data, PenWP needs Numerical Weather Prediction (NWP) model winds as a first guess for the Ambiguity Removal step. These data need to be provided in GRIB<\/a> edition 1 or 2.<\/p>\n Documentation is available here<\/a>.<\/p>\n
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