The Inter Range Instrumentation Group (IRIG) is the standards body of the Range Commanders Council (RCC). They publish a number of standards through the RCC Secretariat at White Sands Missile Range (WSMR).
The best known IRIG standard is the IRIG Timecode standard used to timestamp video, film, telemetry, radar, and other data collected at test ranges.
IRIG 106 is a comprehensive telemetry standard to ensure interoperability in aeronautical telemetry application at RCC member ranges. IRIG 106 Chapter 10 is the standard for digital flight data recorders.
IRIG Standard 313-01 addresses test standards for flight termination receivers/decoders.
Heim system data recorders can record and play back data using IRIG clock accuracy. The clock is synchronised by an external IRIG generator All original data is written to the media in the Heim DATaRec proprietary format and replayed in real time or at a faster speed if required.
IRIG Serial Time Code Formats pdf (371kB)