Earth-to-satellite laser long-path absorption measurement of atmospheric trace gases

Nobuo Sugimoto

doi:10.1117/12.3007641

18 December 2023 Earth-to-satellite laser long-path absorption measurement of atmospheric trace gases

Nobuo Sugimoto

Author Affiliations +

Proceedings Volume 12962, AOPC 2023: Optical Spectroscopy and Imaging; and Atmospheric and Environmental Optics; 129620L (2023) https://doi.org/10.1117/12.3007641
Event: Applied Optics and Photonics China 2023 (AOPC2023), 2023, Beijing, China

Abstract

Laser long-path absorption measurements using ground-based laser transmitters and a receiver on a geosynchronous satellite can be an effective method for observing of atmospheric trace gases (such as carbon dioxide and methane) that complement passive satellite sensors and space-borne integrated path differential absorption (IPDA) lidars. It can be also useful for calibration and validation of passive satellite sensors. The authors conducted experiments using a retroreflector on a polar orbit satellite in 1996. The absorption spectrum of ozone in the 9-μm region was successfully measured using TEA CO₂ lasers. However, the optical efficiency of the system and the efficiency of operation were very low, and it was not practical as an operational observation system. One way long-path absorption method to a receiver on a geosynchronous satellite is highly efficient. It does not require a large aperture high-speed satellite-tracking telescope that was required in the retroreflector experiment. Also, the laser power required for the measurement is much lower. In the method using a geosynchronous satellite, the laser transmitters similar to pulsed IPDA lidars can be used for the ground stations. Multiplexing of the measurements from multiple ground stations is possible using time sharing. It would be also possible to apply dual comb spectroscopy, though multiplexing of the measurements is not possible. In this paper, we review the studies on earth-to-satellite laser long-path absorption methods and discuss the feasibility of the method using a geosynchronous satellite.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Nobuo Sugimoto "Earth-to-satellite laser long-path absorption measurement of atmospheric trace gases", Proc. SPIE 12962, AOPC 2023: Optical Spectroscopy and Imaging; and Atmospheric and Environmental Optics, 129620L (18 December 2023); https://doi.org/10.1117/12.3007641

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KEYWORDS

Satellites

Light absorption

Retroreflectors

Gases

Sensors

Spectroscopy

Absorption spectroscopy

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