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Instrument: VISSR-METEOSAT : Visible and Infrared Spin Scan Radiometer (METEOSAT Series)
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Associated Platforms

Spectral/Frequency Information
Wavelength Keyword: Visible
Number Channels: 1
Spectral/Frequency Coverage/Range: 0.5 Ám - 0.9 Ám
Spectral/Frequency Resolution: 2.5km (5km)

Wavelength Keyword: Infrared > Reflected
Number Channels: 1
Spectral/Frequency Coverage/Range: 5.7 Ám - 7.1 Ám
Spectral/Frequency Resolution: 5 km

Wavelength Keyword: Infrared > Thermal
Number Channels: 1
Spectral/Frequency Coverage/Range: 10.5 Ám - 12.5 Ám
Spectral/Frequency Resolution: 5 km

Related Data Sets
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[Text Source: NOAA/NESDIS: ]

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.

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