Point Source Imagers use a finer-scale pixel size, with each pixel covering an area of less than 60 meters to focus in and quantify the plumes emitted from individual point sources. With high spatial resolution sensors point source imagers can pinpoint methane emissions from specific sources, such as industrial facilities, landfills, or natural gas pipelines.

Point emissions often vary over time, requiring observational instruments to frequently re-scan a particular site. As with area flux mappers, clouds and adverse weather conditions can negatively affect the accuracy and consistency of point source imager data.

To date, one satellite (MERLIN) uses LIDAR, rather than SWIR, to detect and quantify methane. LIDAR systems emit laser pulses into the atmosphere. These pulses are typically in the near-infrared spectrum, which is absorbed by methane molecules. When the laser pulses encounter methane molecules, the light is absorbed and then re-emitted at a different wavelength. This process is known as differential absorption.