For more information on detection of contrails, click the link at the bottom of this page. This link will open "Remote Sensing of the Land, Oceans, and Atmosphere with MODIS," a Webcast that details the capabilities of the MODIS instrument on the Aqua and Terra satellites. The link will open in the "Cloud Mask" section. Click the "Thin Cirrus" page on the left menu bar for an example of contrail detection using MODIS channels.