How this is worked out

An aircraft crossing the county low is going somewhere. An aircraft working a field flies the same ground over and over: down one side, a hard turn at the end, back up the next. This page lists the second kind — repeated runs under 500 feet, turning back on itself, inside about three miles of ground, for at least four minutes. Move to the next field and that counts as a separate session, because where each job happened is the point.

Heights are measured against the airport’s elevation, not the field being sprayed, and the ground west of Guthrie is lower than the runway. A run marked “very low” was flown at crop height as far as the data can tell, but these figures are not a measurement of how close to the ground anyone flew.

Crop work is flown under a restricted certificate, and the FAA’s registry records which aircraft hold one — those are marked. An aircraft that is not marked may still have been spraying; the certificate belongs to the aircraft, not the flight.

Aircraft that don’t broadcast their position never appear here. Agricultural aircraft are not required to carry the equipment when they work low outside controlled airspace, so this page is a record of what could be seen, not a complete account of what was flown.

Flight data from adsb.lol contributors under the Open Database License. Aircraft and owner details from the FAA registry, public domain.