High resolution (5.7 km) OSI SAF ASCAT winds available as demonstration product


The OSI SAF ASCAT winds from Metop-A and Metop-B are now available on a high resolution swath grid size of 5.7 km as a demonstration product, parallel to the existing operational 25 km and 12.5 km products. Several users have asked for a higher resolution product and we welcome very much your feedback if you are interested to evaluate the products. Based on the feedback we will consider whether or not a future operational status is useful for these products.

The winds are produced using the CMOD7 geophysical model function and contain stress-equivalent ECMWF background model winds as auxiliary data.

The products are disseminated in BUFR format and they are available only on the KNMI FTP server (ftp.knmi.nl), not through EUMETCast. The data can be found in these directories : /scat/ascat_a_osi_057 (Metop-A) and /scat/ascat_b_osi_057 (Metop-B). If you don't have access to this server (yet), please send a request to scat@knmi.nl and we will provide you with the credentials. The data format is the same as the 25 km and 12.5 km product data formats, see the Product User Manual (http://projects.knmi.nl/scatterometer/publications/pdf/ss3_pm_ascat_1.15.pdf) for more information.

Background information on high resolution ASCAT wind retrievals can be found in this paper:
Vogelzang, J. and A. Stoffelen, ASCAT ultrahigh-resolution wind products on optimized grids, IEEE Journal of Selected Topics in Applied Earth O, 2017, 10, 5, 2332-2339, doi:10.1109/JSTARS.2016.2623861.

Please contact us at scat@knmi.nl for feedback or if you have any further questions.