Meteosat-7 Atmospheric Motion Vector Data 1.0 General Description This data set contains atmospheric motion vector data derived from Meteosat-7 visible, infrared, and water vapor data. The data covers the Indian Ocean region and includes winds from all vertical levels and over both ocean and land. The data are in a columnar ASCII format and were provided by the Cooperative Institute for Meteorological Satellite Studies (CIMSS). 2.0 Data Format Description Each ASCII file contains 11 columns of information: 1. TYPE - Type of Wind WV - Imager Water Vapor IR - Imager Cloud Drift SWIR - Imager Low Level Short Wave IR VIS - Imager Low Level Visible WV10 - Sounder Channel 10 WV11 - Sounder Channel 11 2. SAT - Satellite Type 3. DAY - Julian Day (yyddd) 4. HMS - Time of the wind set (synoptic wind set time) 5. LAT - Latitude of wind vector + north - south 6. LON - Longitude of wind vector + west - east 7. PRE - Pressure height assignment for vector (mb) 8. SPD - Speed of the vector (meters per second) 9. DIR - Direction of vector 10. RFF - CIMSS recursive filter quality control value 11. QI - EUMETSAT control value 3.0 File Naming Convention yyyymmdd.hh.Indian.AllWindsQIText yyyy is the year mm is the month dd is the day of month hh is the UTC hour Indian - all data are in the Indian Ocean sector 4.0 Data Processing Information Atmospheric motion vectors (AMV) are derived from a sequence of satellite imagery. Various channels can be used to calculate wind vectors at different atmospheric levels. The wind vectors can be used qualitatively by TC forecasters help visualize the wind field around TCs, as well as quantitatively within numerical weather prediction models. Atmospheric analysis products, such as wind shear, vorticity, and convergence, can be also be derived from these wind fields. Primary Investigators : Chris Velden, Steve Wanzong, Dave Santek, Dave Stettner Project Homepage 5.0 References http://tropic.ssec.wisc.edu/tropic.php - CIMSS Tripical Cyclones web site