Research Papers

Ground-based demonstration of a CO2 remote sensor using a 1.57μm differential laser absorption spectrometer with direct detection

[+] Author Affiliations
Daisuke Sakaizawa, Shuji Kawakami

Japan Aerospace Exploration Agency, Earth Observation Research Center, 2-1-1 Sengen, Tsukuba, Ibaraki 305-8505 Japan

Masakatsu Nakajima

Japan Aerospace Exploration Agency, Satellite Applications and Promotion Center, 2-1-1 Sengen, Tsukuba, Ibaraki 305-8505 Japan

Yosuke Sawa, Hidekazu Matsueda

Meteorological Research Institute, Geochemical Research Department, 1-1, Nagamine, Tsukuba, Ibaraki 305-0052 Japan

J. Appl. Remote Sens. 4(1), 043548 (October 14, 2010). doi:10.1117/1.3507092
History: Received February 25, 2010; Revised October 1, 2010; Accepted October 4, 2010; October 14, 2010; Online October 14, 2010
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Abstract

A 1.57-μm laser remote sensor using differential absorption spectrometry is being developed as a candidate for the next space-based mission to observe atmospheric CO2 and/or other trace gases. The performance of the newly-developed active remote sensor has been evaluated for horizontal measurements and initial vertical measurements have been demonstrated. This study shows the results of in-house and field measurements to evaluate column-averaged CO2 mixing ratios. The in-house measurements demonstrated the instrumental response showing agreement within a correlation coefficient of 0.998 for a known CO2 density. Field measurements to evaluate horizontal and vertical column-averaged CO2 mixing ratio were made with a measured precision of 0.49% and 1.7%, respectively. The horizontal integration range was 2.1 km and the vertical range extended from the surface up to the cloud base at ~3 km with corresponding accumulation time of 25 min. Complementary measurements with a multi-positioned in-situ sensor along the observation path demonstrated that the mean horizontal column-averaged CO2 density agreed within the difference of 2.8 ppm of the atmospheric CO2 density.

© 2010 Society of Photo-Optical Instrumentation Engineers

Citation

Daisuke Sakaizawa ; Shuji Kawakami ; Masakatsu Nakajima ; Yosuke Sawa and Hidekazu Matsueda
"Ground-based demonstration of a CO2 remote sensor using a 1.57μm differential laser absorption spectrometer with direct detection", J. Appl. Remote Sens. 4(1), 043548 (October 14, 2010). ; http://dx.doi.org/10.1117/1.3507092


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