Squitter refers to random pulses, pulse-pairs and other non-solicited messages used in various aviation radio systems' signal maintenance. Squitter pulses were originally, and are still, used in the DME/TACAN air navigation systems.

What's the meaning of squitter?

Filters. To create watery stool; to squirt.

What is a squitter aviation?

If you've ever flown with a Mode S transponder, you've already done your fair share of “squittering.” By definition, the word “squitter” refers to a periodic burst or broadcast of aircraft-tracking data that is transmitted periodically by a Mode S transponder without interrogation from controller's radar.