Summary and examples of field measurement data. Panel (a) shows methane enhancements for all measurement days, spliced into a single timeline, using the high range (right) axis for enhancements within 500 m of the pipeline leak location and the low range (left) axis for the remainder of the measurements. Panel (b) shows the field data for the pipeline leak superimposed over satellite imagery near the leak location. Panel (c) illustrates methane enhancements seen by the vehicle-mounted measurement system near a pig launcher leaking at approximately 87 g CH₄/hr. Images from Google Earth Pro™. DOI: https://doi.org/10.1525/elementa.258.f3