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Instrument: GUVI : Global Ultraviolet Imager
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Associated Platforms
TIMED

Spectral/Frequency Information
Wavelength Keyword: Ultraviolet
Number Channels: 4
Spectral/Frequency Coverage/Range: 115 - 180 nm

Related Data Sets
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Description
The Global Ultraviolet Imager (GUVI) is one of four instruments that constitute
the TIMED spacecraft, the first mission of the NASA Solar Connections program.
The TIMED spacecraft is being built by Johns Hopkins University Applied Physics
Laboratory and GUVI is a joint collaboration between JHU/APL and the Aerospace
Corporation. TIMED will be used to study the energetics and dynamics of the
Mesosphere and lower Thermosphere between an altitude of approximately 60 to
180 kilometers

GUVI is a far-ultraviolet (115 to 180 nm), scanning imaging spectrograph that
provides horizon-to-horizon images in five selectable wavelength intervals, or
"colors." These colors (HI 121.6 nm, OI 130.4 nm, OI 135.6 nm, and N2
Lyman-Birge-Hopfield bands 140 to 150 nm and 165 to 180 nm) are chosen in order
to produce the GUVI key parameters.

GUVI is based on heritage from the Special Sensor Ultraviolet Spectrographic
Imager (SSUSI), an instrument previously built for Defense Meteorological
Satellite Program Block 5d-3 satellites, which will fly on the DMSP Block 5D3
satellites F-16 through F-20. The instrument consists of a scan mirror feeding
a parabolic telescope and Rowland circle spectrograph, with a wedge-and-strip
detector at the focal plane.

Additional information available at
http://guvi.jhuapl.edu/about/introduction.shtml

Online Resources
http://guvi.jhuapl.edu/

Instrument Logistics
Data Rate: 8 kbps
Instrument Start Date: 2001-12-07
Instrument Owner: Johns Hopkins University/Applied Physics Lab