07/03/03 48821 CTB Converted to XML format This relation is used to contain the observation data for astrometry. The event time is taken from the time found in the MSC file but there is no msc_events record for this event. The fields are used to set astrometry keywords. C20 YYYY.DDD.HH.MM.SS.CC the time within a hundreth of a second for each obset. C3 BASE_36 When a proposal is accepted into the PMDB by SPSS it must be assigned a unique 3 character base 36 program identifier. This is done by the PMDB/ACCEPT_PROP command. It is used for identification of proposals by spacecraft and OPUS software. It is also used in the OPUS and DADS rootname for all archived science data files. Because of flight design software, program_id must be three characters. C2 BASE_36 An observation set is a collection of one or more alignments that are grouped together based on FGS pointing requirements. That is, if multiple alignments can all be executed using the same guide star pair, they are grouped into the same observation set. C2 BASE_36 Observations are numbered sequentially throughout an observation set and are assigned by SMS/Gen. An ob_number is _NOT_ the same as an obset_ID. C1 FGS number, 1 2 or 3, or 0 for all. C8 Keyword name or keyword related parameter name. C20 Formatted value of parameter. MSC_AST_OBSERVE_TYPE Astrometry observation keyword data from MSC file OPUS unique clustered nonclustered