Single-blind test of airplane-based hyperspectral methane detection via controlled releases

This is a Preprint and has not been peer reviewed. This is version 4 of this Preprint.

Downloads

Download Preprint

Supplementary Files
Authors

Evan David Sherwin , Yuanlei Chen, Arvind P Ravikumar , Adam R. Brandt

Abstract

Methane leakage from point sources in the oil and gas industry is a major contributor to global greenhouse gas emissions. The vast majority of such emissions come from a small fraction of "super-emitting" sources which, once detected, can generally be fixed at relatively low cost. We evaluate the emission detection and quantification capabilities of Kairos Aerospace’s airplane-based hyperspectral imaging methane emission detection system. In blinded controlled releases of methane conducted over four days in San Joaquin County, California, USA, Kairos detected 182 of 200 valid nonzero releases, including all 173 over 8 mcfd(CH$_4$) per mile per hour (mph) of wind and none of the 8 nonzero releases below 4 mcfd(CH$_4$)/mph. There were no false positives: Kairos did not detect methane during any of the 19 negative controls. Plume quantification accuracy depends on the wind measurement technique, with a parity slope of 1.15 ($\sigma$=0.037, $R^2$=0.84, N=185) using a cup-based wind meter and 1.45 ($\sigma$=0.059, $R^2$=0.80, N=157) using an ultrasonic anemometer. Quantification error scales roughly as a fixed percentage of emission size. These findings suggest that at 5 mph winds under favorable environmental conditions in the US, Kairos could detect over 50% of total emissions by identifying super-emitting sources.

DOI

https://doi.org/10.31223/osf.io/bqktv

Subjects

Education, Engineering, Other Engineering

Keywords

remote sensing, Hyperspectral Imaging, methane leakage

Dates

Published: 2020-01-08 12:56

Last Updated: 2020-06-17 00:01

Older Versions
License

CC BY Attribution 4.0 International

Add a Comment

You must log in to post a comment.


Comments

There are no comments or no comments have been made public for this article.