Before revision: 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.
After revision: 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.