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Instrument: VIRR : Visible and Infrared Radiometer
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Associated Platforms

Spectral/Frequency Information
Wavelength Keyword: Visible
Spectral/Frequency Coverage/Range: 0.49 - 0.94 micrometers
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Related Data Sets
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The Visible and Infrared Radiometer (VIRR) is a standard
radiometer that measures the intensity of radiation in five
wavelength channels.

Addditional information available at

[Source: National Snow and Ice Data Center, ]

The VIRR identified cloud, land, and water features on the SEASAT mission. It operated in the visible band (0.49-0.94 micrometers) and in the infrared band (10.5-12.5 micrometers). The swath of the VIRR is approximately 2280 kilometers wide, centered on nadir. Spatial coverage for the mission was global, and temporal coverage spanned July 4, 1978 to August 27, 1978. The normal scan period was 1.25 seconds, and 48 scans were completed per minute.

Online Resources

Instrument Logistics
Instrument Start Date: 1978-07-04
Instrument Stop Date: 1978-08-27
Instrument Owner: USA/NASA

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