CubeSat-Scale O2 Atmospheric Band (0-0) Imaging Spectrograph

Details CubeSat-Scale O2 Atmospheric Band (0-0) Imaging Spectrograph CubeSat-Scale O2 Atmospheric Band (0-0) Imaging Spectrograph

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm33c1594d&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM33C-1594

Physics

[0342] Atmospheric Composition And Structure / Middle Atmosphere: Energy Deposition, [3305] Atmospheric Processes / Climate Change And Variability, [3332] Atmospheric Processes / Mesospheric Dynamics, [3394] Atmospheric Processes / Instruments And Techniques

Scientific paper

Assessment of anthropogenic climate impacts and mitigation strategies requires close monitoring of greenhouse gases and associated thermal impacts throughout the atmospheric column. Climate modelers have long predicted a decrease in mesopause temperature in response to increasing abundance of CO2. A clear spectral signature of temperatures at mesospheric altitudes can be observed using the thermally-dependent O2 Atmospheric band (0-0) emission feature around 764 nm, which is intrinsically bright. A 3-axis attitude-controlled CubeSat can provide an ideal platform for a push-broom imaging spectrograph specifically targeting O2 temperature and gravity wave morphology. Herein we describe a notional CubeSat imaging spectrograph mission implemented with a monolithic fused-silica spatial heterodyne spectrometer (SHS) - a variant form of the fourier-transform spectrograph. Assuming that the O2 Atmospheric band (0-0) is sampled from 763.4 nm to 764.7 nm with a brightness of ~700 R, this imaging spectrograph will provide sufficient spectral and photometric sensitivity to extract temperatures with 10 Kelvin precision, and gravity waves with 4-km spatial resolution along a 200 km cross-track swath. The potential impact of such temperature and gravity wave data sets on current climate models will be discussed.

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