07/03/03 48821 CTB Converted to XML format This relation is used to identify the telemetry used to generate various products, and to indicate trigger codes to be used when a changed value has been detected. A trigger code of zero indicates that the latest value must be saved but no immediate processing is required. If there is no entry in this table for a particular class then that telemetry item should be ignored. The names of the telemetry items is found in the eng_telem_name table. The names of the trigger codes are found in the eng_trigger table. C3 FGS for jitter, AST for astrometry, GSA for GS acqusition data, or OTM for STIS temperatures. I4 A small positive value used only in FGS or AST engineering telemetry files. I4 A numeric code indicating the processing to be performed when a change in telemetry value has been detected. A zero value is not a trigger but that entry is used to indicated that the telemetry value should be saved. ENG_TELEM_USE_TYPE Engineering Telemetry Use Relation OPUS unique clustered