Research Papers

Doppler wind and temperature sounder: new approach using gas filter radiometry

[+] Author Affiliations
Larry L. Gordley

GATS, Inc., 11864 Canon Boulevard, Suite 101, Newport News, Virginia 23606 l.l.gordley@gats-inc.com, b.t.marshall@gats-inc.com

Benjamin T. Marshall

GATS, Inc., 11864 Canon Boulevard, Suite 101, Newport News, Virginia 23606 l.l.gordley@gats-inc.com, b.t.marshall@gats-inc.com

J. Appl. Remote Sens. 5(1), 053570 (December 12, 2011). doi:10.1117/1.3666048
History: Received May 26, 2011; Revised October 18, 2011; Accepted November 15, 2011; Published December 12, 2011; Online December 12, 2011
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We present a new approach for measuring high-altitude winds and temperatures. We describe how gas filter correlation radiometry can be employed from low Earth orbit to simultaneously measure the Doppler shift and linewidth of emission spectra to infer both wind and kinetic temperature. Measurements are performed with a simple radiometer that images the limb emission of nitric oxide near 5.3 μm (to sense altitudes of >90 km and <50 km) and carbon dioxide near 4.4 μm (to sense altitudes of <110 km). Observations are made through a single low-pressure gas cell containing a mixture of these target gases. Profiles of temperature and wind can be measured day and night continuously from 25 to over 250 km with <2% uncertainty at intervals of 10 km along-track, far exceeding current capabilities. This approach, using a small, simple, moderately cooled IR camera, could provide unprecedented observations of atmospheric dynamics from the lower stratosphere into the middle thermosphere.

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© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation

Larry L. Gordley and Benjamin T. Marshall
"Doppler wind and temperature sounder: new approach using gas filter radiometry", J. Appl. Remote Sens. 5(1), 053570 (December 12, 2011). ; http://dx.doi.org/10.1117/1.3666048


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