MADIS Satellite Wind Variables ------------------------------------------------------------------------------------------ Code Name Units Max Notes Database QC Level* FSL AWIPS ------------------------------------------------------------------------------------------ All Wind Products 1 ----------------- DD wind direction deg 1 2 X X FF wind speed m/s 1 2 X X U u wind component m/s 1 2 X X V v wind component m/s 1 2 X X HT pressure altitude m 0 3 X X RFF CIMMS/NESDIS recursive filter flag 0 4 X QINM EUMETSAT quality indicator, no model 0 4 X ** QIWM EUMETSAT quality indicator, with model 0 4 X ** LSM Land/sea mask code 0 5 X ** X LEVTYPE level type code 0 6 X X Infrared Cloud-Drift 1 -------------------- DDIR wind direction deg 1 2 X X FFIR wind speed m/s 1 2 X X UIR u wind component m/s 1 2 X X VIR v wind component m/s 1 2 X X HTIR pressure altitude m 0 3 X X RFFIR CIMMS/NESDIS recursive filter flag 0 4 X QINMIR EUMETSAT quality indicator, no model 0 4 X ** QIWMIR EUMETSAT quality indicator, with model 0 4 X ** LSMIR Land/sea mask code 0 5 X ** X Visible Cloud-Drift 1 ------------------- DDVIS wind direction deg 1 2 X X FFVIS wind speed m/s 1 2 X X UVIS u wind component m/s 1 2 X X VVIS v wind component m/s 1 2 X X HTVIS pressure altitude m 0 3 X X RFFVIS CIMMS/NESDIS recursive filter flag 0 4 X QINMVIS EUMETSAT quality indicator, no model 0 4 X ** QIWMVIS EUMETSAT quality indicator, with model 0 4 X ** LSMVIS Land/sea mask code 0 5 X ** X Water Vapor Motion 1 ------------------ DDWV wind direction deg 1 2 X X FFWV wind speed m/s 1 2 X X UWV u wind component m/s 1 2 X X VWV v wind component m/s 1 2 X X HTWV pressure altitude m 0 3 X X RFFWV CIMMS/NESDIS recursive filter flag 0 4 X QINMWV EUMETSAT quality indicator, no model 0 4 X ** QIWMWV EUMETSAT quality indicator, with model 0 4 X ** LSMWV Land/sea mask code 0 5 X ** X Sounder Channel 10 (7.4 um) Water Vapor Motion 1 ---------------------------------------------- DDS10 wind direction deg 1 2 X X FFS10 wind speed m/s 1 2 X X US10 u wind component m/s 1 2 X X VS10 v wind component m/s 1 2 X X HTS10 pressure altitude m 0 3 X X RFFS10 CIMMS/NESDIS recursive filter flag 0 4 X QINMS10 EUMETSAT quality indicator, no model 0 4 X ** QIWMS10 EUMETSAT quality indicator, with model 0 4 X ** LSMS10 Land/sea mask code 0 5 X ** X Sounder Channel 11 (7.0 um) Water Vapor Motion 1 ---------------------------------------------- DDS11 wind direction deg 1 2 X X FFS11 wind speed m/s 1 2 X X US11 u wind component m/s 1 2 X X VS11 v wind component m/s 1 2 X X HTS11 pressure altitude m 0 3 X X RFFS11 CIMMS/NESDIS recursive filter flag 0 4 X QINMS11 EUMETSAT quality indicator, no model 0 4 X ** QIWMS11 EUMETSAT quality indicator, with model 0 4 X ** LSMS11 Land/sea mask code 0 5 X ** X Notes ----- 1. The user can select the different wind product types individually (e.g., DDIR will retrieve only data for the infrared cloud-drift winds), or can choose to get all wind product types with the same variable call (DD will get data for all available product types). The availability of each product type, and the exact algorithms being used to create them, are a function of the satellite data provider. Currently, MADIS supports two processing streams: GOES operational products (3 hour availability, all types), and GOES experimental products (1 hour availability, no sounder channel products). The GOES experimental products are only available in the FSL database. For more information on GOES wind products, see: Daniels, J.M., C. Velden, G.A. Dengel, D.R. Stettner, and W. Bresky, 2003: Status and Development of GOES Wind Products at NOAA/NESDIS. 12th Conference on Satellite Meteorology, Feb 9-13, 2003. 2. Wind speed and direction are reported and stored in the database. The user can optionally select u & v wind components and those will be calculated and returned. The QC results from speed and direction will be used In either case, and if one of the map projections has been selected via the MSETDOM call, the winds will be rotated to match the projection. 3. Pressure is the vertical coordinate reported in the satellite wind products, and is returned along with the horizontal coordinates (lat/lon) in the MSATWNDSTA call. If a height coordinate is desired, the user can select the HT variable, and the MADIS API will use the U.S. Standard Atmosphere calculation to return a pressure altitude. 4. The results of the automated quality control schemes used in the production of the satellite winds at NESDIS are available via the MADIS API. These include the CIMMS/NESDIS recursive filter flag (RFF) and the EUMETSAT quality indicator (QI). There are two forms of the QI, the first provides the QI results where no background model data has been used in its determination, and the second gives the results where background model data has been used. RFF values range from 0 (worst) to 100 (best). Winds having RFF values less than about 45 are filtered out of the dataset before being output by NESDIS. QI values range from 0 (worst) to 1 (best). For more information on the RFF processing see: Hayden, C.M. and R.J. Purser, 1995: Recursive filter objective analysis of meteorological fields, applications to NESDIS operational processing. J. Appl. Meteor., 34, 3-15. For more information on the QI processing see: Holmlund, K., 1998: The utilization of statistical properties of satellite-derived atmospheric motion vectors to derive quality indicators. Wea. Forecasting, 13, 1093-1104. 5. Land/sea mask codes: Value Meaning ----- ------- 0 Land 1 Sea 2 Coast 6. Level type codes: Value Meaning ----- ------- 1 Infrared cloud-drift 2 Visible cloud-drift 3 Water vapor motion 5 Sounder channel 11 (7.0 um) water vapor motion 7 Sounder channel 10 (7.4 um) water vapor motion * The QC information is only available with the FSL database. ** The QI's and the LSM (for the FSL database) aren't yet available (as of 10/03) in the data files. These are expected to be added sometime in the next several months. When they are added, no MADIS API changes will be needed -- you will just start seeing non-missing data when you ask for these variables.