Every Bit Counts; Frame Synchronization in Jet Propulsion Laboratory's Advanced Multi-Mission Operations System (AMMOS)
Elizabeth (Betsy) Wilson · SpaceOps 2002 Conference · 2002
The Jet Propulsion Laboratory's (JPL) Advanced Multi-Mission Operations System (AMMOS) system processes data received from deep-space spacecraft, where error rates can be high, bit rates are low, and data is unique and precious.Frame synchronization and packet extraction of CCSDS packet telemetry as performed by AMMOS enhance data acquisition and reliability for maximum data return and validity.Unique aspects of sync acquisition, maintenance, and loss are discussed.Also covered are Reed-Solomon decoding and checksum processing as they relate to frame sync processing.Data validity, phase determination, invalid data processing and analysis, and other topics are covered.