Polar Winds - Multimission
Description
MODIS and AVHRR data are used to retrieve tropospheric winds (speed, direction, and height) in the polar regions by tracking cloud and water vapour features. Much of this information cannot be generated fast enough for use in early NWP model runs due to the delay in obtaining MODIS and AVHRR data (typically 1-4 hrs). To improve the timeliness of the wind data, direct broadcast (DB) sites provide real-time access to water vapour winds (wvap) bufr files from MODIS data, as well as IR cloud-drift winds (cdft) bufr files from both MODIS and AVHRR data.
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