STUDY SUMMARY - IPMU

SUMMARY REPORT
WIDE FIELD FIBER-FED OPTICAL
MULTI-OBJECT SPECTROMETER (WFMOS)
3.15 Data Reduction
The Data Reduction (DR) Subsystem comprises four basic sub-components:
• A data handling system (DHS).
• An infrastructure for running DR.
• Quick-look data visualization.
• Data reduction routines.
The subsystem directly interfaces to the Detector Controller(s) (to whom it provides data
storage facilities) and to the Software Control subsystem, which provides overall control and
handles all external interfaces.
The bulk data interface will be provided by Network Attached Storage (NAS) system; the
data store will be directly available through mount points to the other systems. Control interfaces
will be provided as Python wrappers; in this way, the other systems can be insulated from the
underlying communication system. The underlying communications will be handled either by an
ORB (if the design re-uses the Subaru SIMCAM software communications) or by a common
message bus (if the Gemini Pipeline Reduction System - PRS communications are preferred).
Communications with the Quick-look tools will be possible either by direct access to the NAS or
via IVOA Spectral and Image access protocols, thereby allowing any VO-compliant tool
(VOSpec, SPLAT, etc.) to be able to access the data.
Figure 3.15-1: DR Subsystem Block Diagram and Interfacing
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