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David M. Harland

EVLA WIDAR Correlator Face-to-Face Meeting. Interaction of SSS Software with WIDAR Correlator. David M. Harland. 1. 2007-Dec-11. EVLA WIDAR Correlator Face-to-Face Meeting. What Is “SSS”?. SSS = Scientific Support Systems SSS ≠ Monitor & Control

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David M. Harland

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  1. EVLA WIDAR Correlator Face-to-Face Meeting Interaction of SSS Software with WIDAR Correlator David M. Harland 1 2007-Dec-11

  2. EVLA WIDAR Correlator Face-to-Face Meeting What Is “SSS”? • SSS = Scientific Support Systems • SSS ≠ Monitor & Control • SSS software captures what observers want to do, and how & when they want to do it. • Proposal Submission (formerly) • Observation Preparation • Observation Scheduling • Portion of Observation Execution? SSS Interactions With WIDAR 2 2007-Dec-11

  3. EVLA WIDAR Correlator Face-to-Face Meeting Organization of SSS Software • Applications: • Observation Preparation, Source Catalog,Hardware Configuration Catalog (2008),Calibrator Selector (2008), Scheduler • Utility, Domain Model, Data Access, and some User Interface software are in common libraries shared by ALL applications • Knowledge of astronomy and hardware is not contained in the applications themselves, but in the libraries those applications employ SSS Interactions With WIDAR 3 2007-Dec-11

  4. EVLA WIDAR Correlator Face-to-Face Meeting Configuring WIDAR (1 of 6) • Upcoming “Week of Work” will determine: • SSS / DRAO responsibilities; i.e., which smarts go where • Interaction between SSS / DRAO software; e.g., SSS talking to (non-real-time instance of) Configuration Mapper for validation of configuration instructions • Detailed content of configuration instructions • Rest of this section contains best guesses SSS Interactions With WIDAR 4 2007-Dec-11

  5. EVLA WIDAR Correlator Face-to-Face Meeting Configuring WIDAR (2 of 6) • SSS will have object(s) that represent configuration of WIDAR. This object(s) will: • Know how to craft properly formed VCI messages • Speak correlator language of basebands and subbands • Be able to translate from science view (spectral windows) into correlator view (subbands) • Understand WIDAR specifics, e.g.: subband bandwidth restrictions, recirculation, correlator resources, etc. SSS Interactions With WIDAR 5 2007-Dec-11

  6. EVLA WIDAR Correlator Face-to-Face Meeting Configuring WIDAR (3 of 6) • Obs Prep Tool (OPT) will employ above object(s) to create WIDAR configuration while interacting with observer • Will application (eg, OPT) contact Config Mapper (w/ XML) or will this object(s) be expected to do that directly? • How smart will SSS object(s) be? So smart that it gains nothing from contact w/ Config Mapper? SSS Interactions With WIDAR 6 2007-Dec-11

  7. EVLA WIDAR Correlator Face-to-Face Meeting Configuring WIDAR (4 of 6) • OPT will deal with only a subset of VCI elements • subbarray, basebandPair, subband • OPT might only partially populate some of these elements • E.g., not likely to populate stationHw • Probably store in DB in object-form (not XML) • VCI messages will likely need to be completed by Executor (possibly Scheduler?) • By using same SSS object(s)? SSS Interactions With WIDAR 7 2007-Dec-11

  8. EVLA WIDAR Correlator Face-to-Face Meeting Configuring WIDAR (5 of 6) • SSS WIDAR configuration object(s) will give feedback regarding ability to support observer's requests • It might suggest several near-miss alternatives SSS Interactions With WIDAR 8 2007-Dec-11

  9. EVLA WIDAR Correlator Face-to-Face Meeting Configuring WIDAR (6 of 6) • User interaction in OPT • Users will be presented with hardware-neutral display that allows them to choose spectral lines and regions of continuum, and to specify various properties of these lines and regions • An “advanced” view will be more hardware specific • LO settings, baseband and subband placement, correlator resource allocation, CBE configuration, etc. SSS Interactions With WIDAR 9 2007-Dec-11

  10. EVLA WIDAR Correlator Face-to-Face Meeting Work Schedule (1 of 2) • User Interface • Group of scientists (Sjouwerman, Rupen, Owen, Hesman, Butler, van Moorsel) are guiding user interface • We're working with drawing programs at this point • User interface developers (Truitt, Rochford) have done R&D and proofs-of-concept for supporting req'ts in web browser • Conclusion: it can be done • Hardware config will be main UI focus 2008Q1 SSS Interactions With WIDAR 10 2007-Dec-11

  11. EVLA WIDAR Correlator Face-to-Face Meeting Work Schedule (2 of 2) • Domain Model: • Recently created generalized and EVLA-specific code for antenna electronics • Prepares signals for correlator configuration • Can say “given input signals and LO settings, here's the outputs you get”. Cannot yet create LO settings based on known input and desired outputs. • WIDAR configuration will be main model focus for 2008Q1 • Not expecting interaction w/ config mapper in that qtr SSS Interactions With WIDAR 11 2007-Dec-11

  12. EVLA WIDAR Correlator Face-to-Face Meeting The End David M. Harland 12 2007-Dec-11

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