Path-averaged atmospheric CO2 measurement using a 1.57 &#956;m active remote sensor compared with multi-positioned in situ sensors

Daisuke Sakaizawa; Shuji Kawakami; Masakatsu Nakajima; Yosuke Sawa; Hidekazu Matsueda; Kazuhiro Asai; Syumpei Kameyama; Masaharu Imaki; Yoshihito Hirano; Shinichi Ueno

doi:10.1117/12.828573

11 August 2009 Path-averaged atmospheric CO₂ measurement using a 1.57 μm active remote sensor compared with multi-positioned in situ sensors

Daisuke Sakaizawa, Shuji Kawakami, Masakatsu Nakajima, Yosuke Sawa, Hidekazu Matsueda, Kazuhiro Asai, Syumpei Kameyama, Masaharu Imaki, Yoshihito Hirano, Shinichi Ueno

Author Affiliations +

Proceedings Volume 7460, Lidar Remote Sensing for Environmental Monitoring X; 746006 (2009) https://doi.org/10.1117/12.828573
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

The Green-house gas Observation SATellite (GOSAT) was launched to determine the continental CO₂ inventories. Its sensor is based on a passive remote sensing technique developed to achieve less than 1% relative accuracy for atmospheric CO₂ measurements. Meanwhile, a laser remote sensor with the differential absorption spectrometry has been developed for a candidate of a future space-based mission to observe the atmospheric CO₂ or other trace gases. A prototype of the newly developed active remote sensor has been performed to demonstrate a properly validated performance for ground-based and airborne systems. This study shows the results of the in-house and field measurements. The in-house measurement demonstrated the linearity with the correlation coefficient of over 0.99 between the instrumental response and the known CO₂ density in the cell. The diurnal variation obtained from our system is consistent (correlation coefficient of 0.95) with that of multi-positioned in situ sensors, indicates the spatial responsibility of the atmospheric CO2 obtained from our remote sensor with two ~3-km observation paths.

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Daisuke Sakaizawa, Shuji Kawakami, Masakatsu Nakajima, Yosuke Sawa, Hidekazu Matsueda, Kazuhiro Asai, Syumpei Kameyama, Masaharu Imaki, Yoshihito Hirano, and Shinichi Ueno "Path-averaged atmospheric CO₂ measurement using a 1.57 μm active remote sensor compared with multi-positioned in situ sensors", Proc. SPIE 7460, Lidar Remote Sensing for Environmental Monitoring X, 746006 (11 August 2009); https://doi.org/10.1117/12.828573

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