| Instrument: VAS : VISSR Atmospheric Sounder |
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Associated Platforms GOES-8 GOES-7 GOES-6 GOES-5 GOES-4 Spectral/Frequency Information Wavelength Keyword: Infrared > Thermal Spectral/Frequency Coverage/Range: 10.5 μm - 12.5 μm Related Data Sets View all records related to this instrument Description The VAS is an advanced version of the Visible Infrared Spin Scan Radiometer (VISSR) flown on the SMS and early GOES satellites. This instrument flown on GOES 4-8 is a visible and infrared radiometer that provides image (VISSR mode) and sounding (VAS mode) data. The VAS retained the VISSR dual-band imaging function while expanding to 6 infrared channels. The additional spectral bands provided are sensitive to the effects of atmospheric constituents which allows for determination of surface and cloud-top temperatures as in VISSR along with three-dimensional structure of the atmospheric temperature and water-vapor distribution. The 12 Infrared spectral bands span central wavelengths from 3.9 to 15.0um. The ground resolution is 1km in the visible range and 7km (imaging) and 14km (sounding) in the infrared ranges. The swath width is the Earth disc. The following is a table displaying the Infrared spectral bands. SPECTRAL PRESSURE LEVEL WAVELENGTH BAND (mb)* (um) BAND -------- -------------- ---------- ------------- 1 65 14.730 CO2
Online Resources http://nssdc.gsfc.nasa.gov/nmc/experimentDisplay.do?id=1987-022A-01 http://amsglossary.allenpress.com/glossary/search?id=visible-infrared-spin-scan-radi1 Instrument Logistics Instrument Owner: USA/NOAA |
