PCM Backfill: Providing PCM to the Control Room Without Dropouts

• Main Authors: Morgan, Jon, Jones, Charles H.
• Other Authors: Edwards Air Force Base
• Language: en_US
• Published: International Foundation for Telemetering 2014
• Subjects: Pulse Code Modulation (PCM); network; wireless; telemetry; data processing; Telemetry Network System (TmNS); integrated Network Enhanced Telemetry (iNET); Transmission Control Protocol (TCP); recorder; Enhanced Query Data Recorder (EQDR)
• Online Access: http://hdl.handle.net/10150/577490

ITC/USA 2014 Conference Proceedings / The Fiftieth Annual International Telemetering Conference and Technical Exhibition / October 20-23, 2014 / Town and Country Resort & Convention Center, San Diego, CA === One of the initial control room capabilities to be demonstrated by iNET program is the ability to provide data displays in the control room that do not contain data dropouts. This concept is called PCM Backfill where PCM data is both transmitted via traditional SST and recorded onboard via an iNET compatible recorder. When data dropouts occur, data requests are made over the telemetry network to the recorder for the missing portions of the PCM data stream. The retrieved data is sent over the telemetry network to the backfill application and ultimately delivered to a pristine data display. The integration of traditional SST and the PCM Backfill capability provides both real-time safety of flight data side-by-side with pristine data suitable for advanced analysis.