Other
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsa51a..09p&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #SA51A-09
Other
0300 Atmospheric Composition And Structure, 0310 Airglow And Aurora, 0358 Thermosphere: Energy Deposition, 0394 Instruments And Techniques, 2435 Ionospheric Disturbances
Scientific paper
The TIMED Global Ultraviolet Imager is a hyperspectral imager: it obtains spatial and spectral images. The GUVI instrument creates five simultaneous spectral images out of the three dimensional image cube created by the combination of a scan mirror and a spectrograph. These five colors are intended to embody all the information required to meet the GUVI science objectives. In this talk we discuss the flow down of requirements from the science mission (see talk by Christensen et al. in this session) to the design and construction of GUVI. The calibration of GUVI is discussed in general terms: the details are given in the talk by Wolven et al. in this session. GUVI has science driven requirements. For example, these requirements embody the ability to image faint UV emissions on the nightside disk as well as bright limb observations on the dayside. This means that GUVI has to cover an effective range of 1000 from day to night. During the nightside observations the faint atomic oxygen nightglow has to be imaged as well as the geocoronal H Lyman alpha which may be 1000 times brighter. In the auroral region, GUVI can image proton precipitation even under sunlit conditions. This places a requirement on both the sensitivity and overall count rate. GUVI data products also have to be validated. We will review our plans to validate the GUVI data products using models and corroborating observations from other instruments. We will discuss the issues inherent in either approach and the limitations as well as the benefits of the coordinated analysis of GUVI data.
Christensen Andrew B.
Humm David C.
Kil Hyosub
Meng Chun
Morrison Douglas
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