Imaging Spectrometers/Radiometers
type: Concept

VIRR
type: Concept
definition: The Visible and Infrared Radiometer (VIRR) is a standard radiometer that measures the intensity of radiation in five wavelength channels. Addditional information available at http://www.met.rdg.ac.uk/~swsgrime/artemis/ch2/other/other.html [Source: National Snow and Ice Data Center, http://nsidc.org/data/docs/daac/seasat_platform.gd.html ] 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. Group: Instrument_Details Entry_ID: VIRR Group: Instrument_Identification Instrument_Category: Earth Remote Sensing Instruments Instrument_Class: Passive Remote Sensing Instrument_Type: Spectrometers/Radiometers Instrument_Subtype: Imaging Spectrometers/Radiometers Short_Name: VIRR Long_Name: Visible and Infrared Radiometer End_Group Group: Associated_Platforms Short_Name: SEASAT 1 End_Group Group: Spectral_Frequency_Information Wavelength_Keyword: Visible Spectral_Frequency_Coverage_Range: 0.49 - 0.94 micrometers End_Group Group: Spectral_Frequency_Information Wavelength_Keyword: Infrared > Reflected Spectral_Frequency_Coverage_Range: 10.5 - 12.5 micrometers End_Group Online_Resource: http://nsidc.org/data/docs/daac/seasat_platform.gd.html Creation_Date: 2009-03-02 Group: Instrument_Logistics Instrument_Start_Date: 1978-07-04 Instrument_Stop_Date: 1978-08-27 Instrument_Owner: USA/NASA End_Group End_Group
in scheme: instruments