MADIS Satellite Radiance Variables ------------------------------------------------------------------------------------------ Code Name Units Max Notes Database QC Level* FSL AWIPS* ------------------------------------------------------------------------------------------ Radiance Products 1 ----------------- TB[nn] brightness temperature K 0 2 X SKINT skin temperature K 0 X LSM land/sea mask code 0 3 X DAYNITE day/Night qualifier code 0 5 X FOVNUM field of view number 0 X GRIDSE grid point solar elevation m 0 X GRIDP grid point pressure Pa 0 X SATID satellite identifier code 0 4 X TERRTYP terrain type code 0 6 X ZENITH satellite zenith angle deg 0 X Notes ----- 1. The availability and meaning of each product type are a function of the satellite data provider. Currently, MADIS provides radiances (also called brightness temperatures) from the NOAA Polar Orbital Environmental Satellites (POES). The brightness temperatures are from the Advanced Microwave Sounding Unit A (AMSU-A) and the High Resolution Infrared Radiation Sounders (HIRS/3 and HIRS/4). There are many references available on the web. 2. The variable names for the brightness temperatures include the desired channel number (TB01 through TB35), specified with a leading zero, if necessary (e.g., TB01). The different channels represent different frequency bands in which data are aqcuired. Channels 1-20 are the HIRS channels. Channels 21-35 are the AMSU-A channels 1-15. 3. Land/sea mask codes: Value Meaning ----- ------- 0 Land 1 Sea 2 Coast 4. Satellite that provided the data codes: Value Meaning ----- ------- 206 NOAA-15 207 NOAA-16 209 NOAA-18 5. Day/Night Qualifier codes: Value Meaning ----- ------- 0 Day 1 Night 6. Terrain Type codes: Value Meaning ----- ------- 0 Sea ice 1 Snow on land 7. Cloud Amount codes: Value Meaning ----- ------- 0 okta -- 0 (Clear) 1 okta or less, but not zero -- 1/10 or less, but not zero 2 oktas -- 2/10 - 3/10 3 oktas -- 4/10 4 oktas -- 5/10 5 oktas -- 6/10 6 oktas -- 7/10 - 8/10 7 oktas or more, but not 8 oktas -- 9/10 or more, but not 10/10 8 oktas -- 10/10 (Overcast) 9 Sky obscured by fog and/or other meteorological phenomena 10 Sky partially obscured by fog and/or other meteorological phenomena 11 Scattered 12 Broken 13 Few 14 Reserved 15 Cloud cover is Indiscernible for reasons other than fog or other meteorological phenomena, or observation is not made * There is no QC applied to the brightness temperatures. * The satellite radiance data is only available with the FSL database.