High spatial resolution imaging of methane and other trace gases with the airborne Hyperspectral Thermal Emission Spectrometer (HyTES)

High spatial resolution imaging of methane and other trace gases with the airborne Hyperspectral Thermal Emission Spectrometer (HyTES)

Currently large uncertainties exist associated with the attribution and quantification of fugitive emissions of criteria pollutants and greenhouse gases such as methane across large regions and key economic sectors. In this study, data from the airborne Hyperspectral Thermal Emission Spectrometer (H...

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Bibliographic Details
Published in:Atmospheric measurement techniques Vol. 9; no. 5; pp. 2393 - 2408
Main Authors: Hulley, Glynn C, Duren, Riley M, Hopkins, Francesca M, Hook, Simon J, Vance, Nick, Guillevic, Pierre, Johnson, William R, Eng, Bjorn T, Mihaly, Jonathan M, Jovanovic, Veljko M, Chazanoff, Seth L, Staniszewski, Zak K, Kuai, Le, Worden, John, Frankenberg, Christian, Rivera, Gerardo, Aubrey, Andrew D, Miller, Charles E, Malakar, Nabin K, Sánchez Tomás, Juan M, Holmes, Kendall T
Format: Journal Article
Language:English
Published: Katlenburg-Lindau Copernicus GmbH 01-06-2016
Copernicus Publications
Subjects:
Air pollution
Aircraft
Algorithms
Atmospheric methane
Clutter
Detection
Economic sectors
Emission analysis
Emissions
Emitters
Environmental conditions
Gases
Greenhouse effect
Greenhouse gases
Imaging
Imaging techniques
Laboratories
Mapping
Matched filters
Methane
Mitigation
Nitrogen dioxide
Plumes
Pollutants
Remote sensing
Resolution
Sensors
Spatial discrimination
Spatial resolution
Spectral resolution
Sulfur
Sulfur dioxide
Surveys
Thermal emission
Trace gases
Los Angeles California
United States > US
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Summary:Currently large uncertainties exist associated with the attribution and quantification of fugitive emissions of criteria pollutants and greenhouse gases such as methane across large regions and key economic sectors. In this study, data from the airborne Hyperspectral Thermal Emission Spectrometer (HyTES) have been used to develop robust and reliable techniques for the detection and wide-area mapping of emission plumes of methane and other atmospheric trace gas species over challenging and diverse environmental conditions with high spatial resolution that permits direct attribution to sources. HyTES is a pushbroom imaging spectrometer with high spectral resolution (256 bands from 7.5 to 12 µm), wide swath (1–2 km), and high spatial resolution (∼ 2 m at 1 km altitude) that incorporates new thermal infrared (TIR) remote sensing technologies. In this study we introduce a hybrid clutter matched filter (CMF) and plume dilation algorithm applied to HyTES observations to efficiently detect and characterize the spatial structures of individual plumes of CH4, H2S, NH3, NO2, and SO2 emitters. The sensitivity and field of regard of HyTES allows rapid and frequent airborne surveys of large areas including facilities not readily accessible from the surface. The HyTES CMF algorithm produces plume intensity images of methane and other gases from strong emission sources. The combination of high spatial resolution and multi-species imaging capability provides source attribution in complex environments. The CMF-based detection of strong emission sources over large areas is a fast and powerful tool needed to focus on more computationally intensive retrieval algorithms to quantify emissions with error estimates, and is useful for expediting mitigation efforts and addressing critical science questions.
ISSN:1867-8548
1867-1381
1867-8548
DOI:10.5194/amt-9-2393-2016