First Direct Broadcast VIIRS Polar Winds
18 March 2014 - The first direct broadcast Visible Infrared Imaging Radiometer Suite (VIIRS) polar winds have been generated by CoRP's Advanced Satellite Products Branch with data from the University of Alaska-Fairbanks receiving system on 12 March 2014. The winds are produced on-site at the NESDIS Fairbanks Command and Data Acquisition Station (FCDAS, aka Gilmore Creek).
STAR / CoRP's Advanced Satellite Products Branch and the Cooperative Institute for Meteorological Satellite Studies (CIMSS) have been producing polar winds products from MODIS and AVHRR and distributing then to various numerical weather prediction (NWP) centers around the world since 2002, though they weren't operational in NESDIS until some years later. Polar winds are generated at direct broadcast (DB) sites simply to reduce latency; i.e., the time it takes to generate and deliver the winds to NWP centers. Conventional (non-direct broadcast) MODIS and AVHRR winds aren't available for 2-5 hrs due to the delay in availability of the satellite data. At direct broadcast sites winds are available in about 20 minutes.
ASPB/CIMSS currently generates polar winds at 5 direct broadcast sites; 3 in the Arctic and 2 in the Antarctic. (map) There are antennae in 6 locations, but the Barrow data are sent to Fairbanks for processing. ASPB/CIMSS has computers in each location so all the processing is done on-site. Then the small wind data files are sent back to Madison where they are distributed to NWP centers and to EUMETSAT, which broadcasts them via EUMETCast.
Fairbanks is the first of the DB sites where ASPB/CIMSS is doing polar winds from VIIRS. The VIIRS data are from a University of Alaska-Fairbanks satellite antenna system, which are then sent to the NESDIS Fairbanks Command and Data Acquisition Station for processing.
Polar Wind Direct Broadcast Sites
Data, algorithms, and images presented on STAR websites are intended for experimental use only and are not supported on an operational basis. More information