Wiktionary
n. 1 (context archaic English) Watery stool. 2 (context communications engineering English) A random broadcast of data occurring either intentionally or in response to noise. vb. 1 To create watery stool; to squirt. 2 (context communications engineering English) To broadcast squitter.
Wikipedia
Squitter is a term relating to random pulses, pulse-pairs and other non-solicited messages used in various aviation radio systems. Squitter pulses were originally, and are still, used in the DME/ TACAN air navigation systems. Squitter pulses, because of their randomness, appear the same as unsolicited/unsynchronised replies to other interrogating aircraft, as they are identical.
Primarily, squitter is used to maintain a regular signal from the ground beacon. In the TACAN system, signal strength variation due to rotation of the transmitting beam, determines the course bearing function. (This function would be lost without a constant 2700-4800 pulse-pairs per second) in case of a lack of interrogating aircraft.
In the Mode S secondary surveillance radar system, 'squitter' is a term used to describe messages that are unsolicited downlink transmissions from an automatic dependent surveillance-broadcast (ADS-B) Mode S transponder system. Mode S transponders transmit acquisition squitter (unsolicited downlink transmissions) to permit passive acquisition by interrogators with broad antenna beams, where active acquisition may be hindered by all-call synchronous garble. Examples of such interrogators are an airborne collision avoidance system and an airport surface system.
Usage examples of "squitter".
Gagrakacka Mind Zones, with all that stuff going on out there, if this load of anaemic squitter is the best he can be bothered to send us.
Jack squitters in terror but the ogre seems mollified, for he sits down to be served a tremendous meal.
A terrible fear, as disorienting as the flu and as debilitating as a cataclysmic case of the squitters, was enveloping him.