Computer Science
Scientific paper
Sep 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2266..180t&link_type=abstract
Proc. SPIE Vol. 2266, p. 180-193, Optical Spectroscopic Techniques and Instrumentation for Atmospheric and Space Research, Jinxu
Computer Science
Scientific paper
In a companion paper (Swift and Torr), we demonstrate a capability to observe thermospheric dayglow emissions from the ground using a novel photometric approach. In this paper we incorporate the principles of the technique into the design of a spectrometric facility capable of measuring the dayglow spectrum over the wavelength range 300 to 880 m at < 0.5 nm resolution with photometric like sensitivity, namely 50 counts/R at 300 nm and approximately 200 counts/R at 600 nm. the design is an all refractive f/1.4 distortion correctable grating spectrograph capable of operating over a full diurnal cycle with high sensitivity. The field of view is 14 degree(s). The instrument has a dynamic range of 10(superscript 8), no moving parts except shutters, and a noise equivalent detection threshold of approximately 15R in the daytime and 0.01 to 0.1 R at night. The design comprises four spectrometric modules which provide simultaneous measurements of emissions in the 300 - 900 nm range. A 1024 X 1024 CCD is used for the detector. The facility should provide simultaneous measurements from the ground of the rich spectral content of the daytime mesosphere, thermosphere and ionosphere.
Feng Chen
Swift Wesley R.
Torr Douglas G.
Zukic Muamer
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