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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Preprints
https://doi.org/10.5194/amt-2020-53
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-2020-53
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  09 Apr 2020

09 Apr 2020

Review status
A revised version of this preprint was accepted for the journal AMT and is expected to appear here in due course.

An Examination of Enhanced Atmospheric Methane Detection Methods for Predicting Performance of a Novel Multiband Uncooled Radiometer Imager

Cody M. Webber and John P. Kerekes Cody M. Webber and John P. Kerekes
  • Digital Imaging and Remote Sensing Laboratory, Rochester Institute of Technology, Rochester, NY 14623, USA

Abstract. To evaluate the potential for a new uncooled infrared radiometer imager to detect enhanced atmospheric levels of methane, three different analysis methods were examined. A single pixel brightness temperature to NEdT comparison study performed using data simulated from MODTRAN6 revealed a single thermal band centered on the 7.68 μm methane feature is capable of detecting the in band temperature contrast between a plume of about 17 ppm at ambient temperature and background levels of methane at ambient temperature. Application of a normalized differential methane index method, a novel approach for methane detection, demonstrated how a simple two band method can be utilized to detect a plume of methane that is 15 ppm above ambient and −10 K from ambient temperature with 80 % hit rate and 17 % false alarm rate. This method was capable of detecting methane with similar levels of success as the third method, a proven multichannel method, Matched Filter. The matched filter approach was performed with six spectral channels. Results from these examinations suggest that given a high enough concentration and temperature contrast, a multispectral system with a single band allocated to a methane absorption feature can detect methane.

Cody M. Webber and John P. Kerekes

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AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Cody M. Webber and John P. Kerekes

Cody M. Webber and John P. Kerekes

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Latest update: 20 Sep 2020
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Short summary
Here we present a study performed to determine the methane detection capabilities of a novel remote thermal instrument, the Multiband Uncooled Radiometer Imager. We utilize a novel methane detection approach, the normalized differential methane index, that when applied to simulated multispectral thermal imagery with a single spectral channel dedicated to methane detection shows similar results to a state of the art method, the matched filter approach.
Here we present a study performed to determine the methane detection capabilities of a novel...
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