Open-path dual comb spectroscopy to an airborne retroreflector

Optica
Kevin C CosselN R Newbury

Abstract

We demonstrate a new technique for spatial mapping of multiple atmospheric gas species. This system is based on high-precision dual-comb spectroscopy to a retroreflector mounted on a flying multi-copter. We measure the atmospheric absorption over long open-air paths to the multi-copter with comb-tooth resolution over 1.57 to 1.66 pm, covering absorption bands of CO2, Cm, H2O and isotopologues. When combined with GPS-based path length measurements, a fit of the absorption spectra retrieves the dry mixing ratios versus position. Under well-mixed atmospheric conditions, retrievals from both horizontal and vertical paths show stable mixing ratios as expected. This approach can support future boundary layer studies as well as plume detection and source location.

References

Nov 20, 2009·Environmental Science & Technology·Kelly L MaysKevin R Gurney
May 1, 1994·Environmental Science & Technology·T L MarshallW G Fateley
Sep 4, 2015·The Review of Scientific Instruments·L C SinclairI Coddington
Dec 9, 2015·Proceedings of the National Academy of Sciences of the United States of America·Daniel Zavala-AraizaSteven P Hamburg
Jan 7, 2017·Optics Express·Gar-Wing TruongIan Coddington
Jan 1, 2016·Optica·Ian CoddingtonWilliam Swann

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Citations

Sep 27, 2019·Atmospheric Chemistry and Physics·Eleanor M WaxmanNathan R Newbury
Apr 20, 2019·Nature Communications·Hugo BergeronNathan R Newbury
May 15, 2020·Optics Express·Gabriel YcasIan Coddington
Dec 8, 2017·Applied Optics·W C SwannN R Newbury
Jan 24, 2021·Nature Communications·Benjamin P Dix-MatthewsPeter Wolf
Jan 1, 2018·Journal of Molecular Spectroscopy·Adam J FleisherJoseph T Hodges
Sep 28, 2021·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Jacob T ShawGrant Allen

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