| Instrument: VISSR-METEOSAT : Visible and Infrared Spin Scan Radiometer (METEOSAT Series) |
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Associated Platforms METEOSAT-7 METEOSAT Spectral/Frequency Information Wavelength Keyword: Visible Number Channels: 1 Spectral/Frequency Coverage/Range: 0.5 µm - 0.9 µm Spectral/Frequency Resolution: 2.5km (5km) Wavelength Keyword: Infrared > Reflected Number Channels: 1 Spectral/Frequency Coverage/Range: 5.7 µm - 7.1 µm Spectral/Frequency Resolution: 5 km Wavelength Keyword: Infrared > Thermal Number Channels: 1 Spectral/Frequency Coverage/Range: 10.5 µm - 12.5 µm Spectral/Frequency Resolution: 5 km Related Data Sets View all records related to this instrument Description [Text Source: NOAA/NESDIS: http://psbcw1.nesdis.noaa.gov/terascan/home_basic/geosats_sensors_t... ] The sensor of the Meteosat-7 is a three-channel imager known as the Visible and Infrared Spin Scan Radiometer (VISSR) (which is also the name of the GMS imager). This imager has one channel for visible radiation, one for detection of water vapor, and one for infrared radiation. Channel properties are given in the following table: High-resolution PDUS data from Meteosat channel A2 (1694.5) is disseminated in two formats: A and B. The A format is full-disk and the B format covers the European, Northern African, and Middle Eastern regions. In the A and B formats, the VIS channel data are indicated as coming from the "southern" (VISs) or "northern" (VISn) detector mounted in the radiometer. This means that during the scanning of the Earth, the VISs detector scans the line immediately to the south of the VISn detector. The following format abbreviations are used in the Meteosat dissemination schedule for high-resolution images (HRI): AIVH Full-Disk IR and Half-Resolution VIS AIW Full-Disk IR and WV AW Full-Disk WV AV Full-Disk Full-Resolution VIS BIW European Sector IR and WV BIV European Sector IR and Full-Resolution VIS BIVW European Sector IR, WV and Half-Resolution VIS BW European Sector WV ATEST01 Test Pattern ATEST02 Test Pattern IR and WV data are always "full resolution" at 5 km resolution. Full-resolution VIS data is at 2.5 km resolution; half-resolution VIS is at 5 km resolution. WV and IR data are 2500 lines by 2500 samples. Full-resolution VIS data is 5000 lines by 2500 samples each for VISs and VISn. In the A format, the VISn and VISs lines are side-by-side; in the B format they alternate. The starting line of B formats is 1810, the last line is 2434. For the IR and WV formats, the first pixel in a line is 626, the last is 1875. The first pixel within a visible line is 1252 and the last is 3751. Online Resources http://psbcw1.nesdis.noaa.gov/terascan/home_basic/geosats_sensors_tables.html#Meteosat%20Sensor http://www.eumetsat.int/Home/Main/Satellites/MeteosatSecondGeneration/index.htm |
