Processor information

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Processor information

As discussed in Section 2, provision needs to be made for the characterization of the state of the specific back-end device used to produce the final data. Such devices include correlators, radiometers, spectrometers and pulsar timers, amongst others. These device data are not permitted to duplicate general antenna properties represented elsewhere, but are invariably highly instrument-specific. It is proposed that the existing CORRELATOR_ID index be replaced and generalized as:


PROCESSOR_ID        Int        (Processor identifier)         (Reqd.)

This acts as an index into a PROCESSOR sub-table, which similarly replaces the CORRELATOR sub-table, as described in Section 4.0.4. This scheme accommodates parameter and status information associated with each processor, generally by look-up into secondary sub-tables containing this information using a subset of the MAIN key. For single-dish data, however, the processor switching phase is sufficiently fundamental to warrant inclusion as an optional MAIN column, both for access efficiency and data labeling:


PHASE_ID        Int        (Switching phase identifier)         (Opt.)

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