Overall Data Processing Architecture EVLA timeline and priorities

Proposal Preparation and Submission Observation Preparation Observation Scheduling Monitor and Control System AntennaFeedReceiverIF System Local Oscillator Fiber Optics Transmission System Correlator Image Pipeline Data Archive Data Post- Processing Figure 3.1. Principal EVLA Subsystems NRAO Data Management Group (e2e project) Canadian Partner EVLA Project Primary data flow Control and monitor flow CBE

Gustaaf van Moorsel Data Processing Architecture 18 July EVLA Schedule (Calendar years) Start installation of fiber optics cables on YQ Prototype EVLA system lab integration and testQ Install prototype EVLA system on EVLA Test Antenna Q Subsystem CDRsQ Start EVLA electronics production Q Start retrofitting 7 antennas/year with new system Q Start observing in “transition” modeQ Test of prototype correlator on 3 or 4 antennasQ Start outfitting new correlator room Q Start tests of first correlator subset at VLA Q First “shared-risk” science with new correlator subset Q Last antenna retrofitted to EVLA design Q New correlator declared “operational” Q Last EVLA receiver installed Q1 2010

Gustaaf van Moorsel Data Processing Architecture 18 July Interfaces e2e – EVLA M&C Correlator (Backend)  Archive M&C System  Archive Observation scheduling  M & C System Pipeline and Post-processing

Gustaaf van Moorsel Data Processing Architecture 18 July Correlator  Archive Paced by correlator development Q New correlator operational – required Q First science with new correlator subset – highly desirable Q Start test first correlator subset at VLA – desirable Q Test correlator prototype - desirable

Gustaaf van Moorsel Data Processing Architecture 18 July M&C System  Archive Archive (and retrieve) monitor data Paced by antenna upgrades Q Start observing in transition mode – required Q Prototype system on EVLA test antenna – highly desirable Q Prototype bench tests - desirable

Gustaaf van Moorsel Data Processing Architecture 18 July Scheduling  M&C System When to transition from ‘cards’ to new Observation Scheduling System? –Less of a ‘drop-dead’ date –Becomes more important as new M&C system gains importance –Q Start test first correlator subset at VLA – highly desirable

Gustaaf van Moorsel Data Processing Architecture 18 July Pipeline and post- processing Required because: –Amount of data –EVLA specific requirements Q new correlator operational – required Q First science with new correlator subset – highly desirable Q Test first correlator subset – desirable

Gustaaf van Moorsel Data Processing Architecture 18 July Priorities 1.Archive Monitor data – Q / Q Visibility data – Q / Q Observation scheduling – Q Pipeline – Q Observing preparation - TBD 5.Proposal preparation/submission - TBD