Probably already widely known but new to me. Vehicles fitted with satellite tracking set off Ka band.
Particular government vehicles and some minning company vehicles have been setting of my Redline on Ka 35ish Ghz.
A friend has one in his company car and now can't run his detector in it because it constantly alerts to the tracking system.
Sucks to be him. Even one with Ka segmentation is no good to him because his tracking system falls within the required segment he needs to have on to detect LEO's in our area.