HiT&MIS: A General Purpose Imaging Spectrograph for Groundbased Observational Studies of Airglow and Aurora

Details HiT&MIS: A General Purpose Imaging Spectrograph for Groundbased Observational Studies of Airglow and Aurora HiT&MIS: A General Purpose Imaging Spectrograph for Groundbased Observational Studies of Airglow and Aurora

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa13b1890c&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SA13B-1890

Physics

Optics

[0310] Atmospheric Composition And Structure / Airglow And Aurora, [0343] Atmospheric Composition And Structure / Planetary Atmospheres, [0394] Atmospheric Composition And Structure / Instruments And Techniques, [2400] Ionosphere

Scientific paper

We describe High Throughput (5×10-4 cm2 sr) and Multi-slit Imaging Spectrograph (HiT&MIS) that uses an echelle grating operating at a high dispersion order (24 - 43) and a single CCD detector to observe airglow and auroral emissions at high spectral resolution (0.02 nm). Instead of using a traditional single slit, radiations enter the spectrograph through four separate slits. The spectral resolution of different features could be selected by varying the slit width. The field of view is selected using appropriate foreoptics and slit length. The instrument, like its predecessors - HiTIES, HIRISE and CHIMES, can simultaneously observe several spectral features located anywhere in the visible band at high resolution. The new design allows all the slits to view the same scene. The number of slits and the silt-dimensions can be tailored to the resolution/throughput/number-of-spectral-features tradeoff depending upon the measurement need. The use of different combinations of detector and filter sets can extend its operation to other wavelength regions. This work was supported by NSF grant 0940283, the USAF grant FA9550-09-1-0441 and NASA grant NNX06AC04G.

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