Other
Scientific paper
Nov 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996spie.2831...65c&link_type=abstract
Proc. SPIE Vol. 2831, p. 65-93, Ultraviolet Atmospheric and Space Remote Sensing: Methods and Instrumentation, Robert E. Huffman
Other
2
Scientific paper
The Global Imaging Monitor of the Ionosphere (GIMI) is one of several remote-sensing instruments under development for flight on the Air Force Space Test Program's P91-1 Advanced Research and Global Observation Satellite, planned for launch in 1997. The primary objective of GIMI is to map and monitor the ionospheric O+ and electron density on a global basis, by means of wide-field imaging of ionospheric far-ultraviolet emissions. it will also be used to detect and characterize local perturbations of the ionosphere due to natural and artificial events. Atomic nitrogen in the upper atmosphere will be measured by nitric oxide nightglow emissions resulting from its combination with atomic oxygen. Observations of stellar occultations by Earth's atmosphere will be used to measure the neutral density distributions of N2 and O2. Other objectives are to map and monitor the ultraviolet background in near-Earth space due to ionospheric and airglow emissions and extraterrestrial sources, and to obtain all-sky surveys of celestial point and diffuse sources. GIMI consists of two wide-field imaging cameras sensitive in three far- and extreme-UV spectral ranges (75 - 110 nm, 131 - 160 nm, and 131 - 200 nm), selected for their utility in day and night ionospheric and neutral atmospheric remote sensing. The GIMI sensors are based on electron-bombarded CCD arrays, with opaque alkali halide photocathodes and Schmidt or all-reflective optical systems.
Carruthers George R.
Seeley Timothy D.
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