ALMA Pipeline Progress and Status

Atacama Large Millimeter/submillimeter Array

Karl G. Jansky Very Large ArrayRobert C. Byrd Green Bank Telescope

Very Long Baseline Array

ALMA Pipeline Progress and StatusANASAC Face-to-FaceSept 16-17, 2013

Jeff KernCASA Team Lead

ALMAPipeline Status• ALMA Interferometric Pipeline is ready to support Cycle 1

Data reduction– Calibration and Diagnostic Images of Phase and

Bandpass Calibrators– Single Dish through imaging*– No support for combination– Some human intervention still required:

• Calibrator Fluxes• Extraordinary Flagging

• Rapid progress made in past year:– Tiger Team led by Todd Hunter– Built on experience from cycle-0 reduction

* Still developing global consensus on best single dish reduction. Pipeline is closely connected to this discussion.

2ANASAC Face-to-Face: Sept. 16,17 2013

ALMAOrganization • Pipeline Working Group now formed

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Liz Humphries (Chair)Eric Villard (Deputy)

Remy Indebetouw

Hiroko Shinnaga

Todd Hunter (ex officio: Tiger Team Lead)

• International test / user team– NAASC Data Analysts– JAO Data Content Managers

ALMACycle-1 Operations • Early Cycle-1: Parallel Reduction

– Each ARC organized slightly differently– Pipeline and manual scripts will be run in parallel results

compared by reducer• Common feedback forms to pipeline to describe

meaningful differences from human reduction.• Late Cycle-1: Pipeline Calibration

– Pipeline does primary calibration for most projects• Band 9, special cases still needs manual reduction.• Data reducer starts with calibrated data from the

archive and does reference imaging.Actually had hoped to already be at this state by now!

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ALMAALMA PipelineExecution Summary

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ALMAALMA PipelineObservation Summary

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ALMAALMA PipelineTask Summary

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ALMAALMA PipelineTask Summary

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ALMAALMA PipelineTask Details

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ALMAALMA PipelineCalibrator Image Production

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ALMAALMA PipelineTarget Imaging

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ALMALooking Forward• Support for cycle-1 operations:

– Dealing with bugs (ours and theirs)• WebLog

– Meeting existing requirements from first focus group meeting

– Revisit WebLog requirements (Q1-2014) based on experience for Cycle 1

• Cycle-2 Capabilities

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• More complicated SPW setups

• Initial Polarization Calibration

• Low SNR Cases (Band 9)

• [More] Flagging Heuristics• Science Target Imaging:

• Are we meeting targets.

Planning for user test prior to Cycle-2 Operations to gather responses from Cycle 1 Experience.

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www.nrao.edu • science.nrao.edu