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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union

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Atmos. Meas. Tech., 9, 2393-2408, 2016
http://www.atmos-meas-tech.net/9/2393/2016/
doi:10.5194/amt-9-2393-2016
© Author(s) 2016. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
01 Jun 2016
High spatial resolution imaging of methane and other trace gases with the airborne Hyperspectral Thermal Emission Spectrometer (HyTES)
Glynn C. Hulley1, Riley M. Duren1, Francesca M. Hopkins1, Simon J. Hook1, Nick Vance1, Pierre Guillevic2, William R. Johnson1, Bjorn T. Eng1, Jonathan M. Mihaly1, Veljko M. Jovanovic1, Seth L. Chazanoff1, Zak K. Staniszewski1, Le Kuai1, John Worden1, Christian Frankenberg4, Gerardo Rivera1, Andrew D. Aubrey1, Charles E. Miller1, Nabin K. Malakar1, Juan M. Sánchez Tomás3, and Kendall T. Holmes1 1Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA
2Department of Geographical Sciences, University of Maryland, College Park, MD 20742, USA
3Universidad de Castilla-La Mancha, Ciudad Real, Spain
4California Institute of Technology, Pasadena, CA 91109, USA
Abstract. 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.

Citation: Hulley, G. C., Duren, R. M., Hopkins, F. M., Hook, S. J., Vance, N., Guillevic, P., Johnson, W. R., Eng, B. T., Mihaly, J. M., Jovanovic, V. M., Chazanoff, S. L., Staniszewski, Z. K., Kuai, L., Worden, J., Frankenberg, C., Rivera, G., Aubrey, A. D., Miller, C. E., Malakar, N. K., Sánchez Tomás, J. M., and Holmes, K. T.: High spatial resolution imaging of methane and other trace gases with the airborne Hyperspectral Thermal Emission Spectrometer (HyTES), Atmos. Meas. Tech., 9, 2393-2408, doi:10.5194/amt-9-2393-2016, 2016.
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Short summary
Using data from a new airborne Hyperspectral Thermal Emission Spectrometer (HyTES) instrument, we present a technique 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 in complex environments.
Using data from a new airborne Hyperspectral Thermal Emission Spectrometer (HyTES) instrument,...
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