ESO Telescopes Scheduling
Transcript of ESO Telescopes Scheduling
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ESO Telescopes Scheduling
Marina RejkubaNando Patat, Lowell Tacconi-Garman
ESO
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20 November 2019, SciOps2019
ESO Observatory Scheduling: contextMulti-site Multi-instrument, different types of instrumentsLarge variety of science programmes
Long Term Schedule vs Short Term ScheduleTelescope Time Allocation Input & processNew Time Allocation Tool
Outline
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ESO Sites
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La Silla Paranal Observatory
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17 Instruments:Imaging, Spectroscopy, IFU, AO, SAM,Coronagraphy, Polarimetry, Interferometry
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Number of proposals per site
~900 proposalsEvery 6 months
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Observing ModesVisitor (Classical) ModeService (Queue) Mode
Observing Programme Types Normal – high priority, medium, filler typeMonitoring Programme – relatively small but long time Target of Opportunity, Rapid Response Mode Large Programme – 10 nights or longer Public Surveys – imaging, spectroscopic surveys Calibration ProgrammeGuaranteed Time Observations Coordinated proposals with XMM
Diversity and Flexibility
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TodayCall for Proposals every 6 months OPC evaluates ~900 proposals (~1600 observing runs) ranked list
Conversion of OPC ranked list into Telescope Schedule Web-letter release
Schedule maintenance (changes)Director’s Discretionary Time (~60/semester)
Telescope Time Allocation
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Science Operations Policy (SM/VM/GTO/ToO/RRM/…)Ranked list of proposals from the OPCObservatory constraints (fixed) Commissioning and Maintenance Calibration plan – fraction of SM allocation
Ongoing commitments Large Programmes, Surveys, Carryovers
Technical feasibility for science proposalsConstraints: sky transparency, moon, atm turbulenceVLTI baselines, ESPRESSO 4UT mode, FORS2 blue CCDLaser collisions
Telescope Time Allocation Input
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VLT+VLTI Long Term Schedule
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Step 1: Observations Filtering airmass, sky transparency, moon, PWV, GL fraction, τ0
image quality as a function of airmass & filter (λ) wind, AO friendly atmosphere, availability of laser, inst. configuration sidereal time, absolute time (include long-term schedule) Result: Observable vs. Non-observable queue
Step 2: Observations Ranking scientific ranking of the programme combined probability of the realization of observing constraints time critical score + setting target score user priority, group score, group contribution Result: ranked list + rank justification
Short Term Scheduling
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Currently – regular Call for Proposals (March/Sept)Target of OpportunityRapid Response Mode
Director General Discretionary TimeJoint ESO VLT-XMM Proposals Up to 80 hours; offered in yearly calls (odd periods)
Time Allocation Working Group RecommendationsLarger time allocations and yearly callFaster turnover – fast track channel
“Cross Facilities Collaboration in the Multi Messenger Era”
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Close the loop: Long – Short Term ScheduleDynamical scheduling/changesGetting ready for ELTTime Allocation Working Group RecommendationsYearly call for Proposals (OPC evaluation)Fast track channel (Distributed Peer Review?)
Realistic constraints including time constraints & linking between observations
New Time Allocation Tool (TAtwo)
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Metrics: input for scheduling
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Metrics
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Maximise the scientific return within the operational specifications
Future:TLR: Follow the ranking provided by the OPC as close as
possibleTLR: Include the ongoing commitmentsTLR: Include prioritised technical/programme needs
within limit posed by the science policy
Top Level Requirement
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Top Level Requirement
maximize scientific return & minimize the differences between the OPC recommendations and the final outcome of an observing period within operational
constraints
New Time Allocation Tool (TAtwo)