1 October 2010 Ground-based demonstration of a CO2 remote sensor using a 1.57µm differential laser absorption spectrometer with direct detection
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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.
Daisuke Sakaizawa, Daisuke Sakaizawa, Shuji Kawakami, Shuji Kawakami, Masakatsu Nakajima, Masakatsu Nakajima, Yosuke Sawa, Yosuke Sawa, Hidekazu Matsueda, Hidekazu Matsueda, } "Ground-based demonstration of a CO2 remote sensor using a 1.57µm differential laser absorption spectrometer with direct detection," Journal of Applied Remote Sensing 4(1), 043548 (1 October 2010). https://doi.org/10.1117/1.3507092 . Submission:
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