Operations Specialists Paranal [calChecker] [HC monitor]calCheckerHC monitor September 2013 The big...
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Transcript of Operations Specialists Paranal [calChecker] [HC monitor]calCheckerHC monitor September 2013 The big...
![Page 1: Operations Specialists Paranal [calChecker] [HC monitor]calCheckerHC monitor September 2013 The big picture I Why do we take calibrations? SCIENCE observations.](https://reader030.fdocuments.in/reader030/viewer/2022032804/56649e4b5503460f94b3ff07/html5/thumbnails/1.jpg)
Operations Specialists Paranal [calChecker] [HC monitor] September 2013
The big picture I
Why do we take calibrations?
SCIENCE observations contain:• scientific information
• OB: question by astronomer to the Universe• science observation: answer by the Universe
Reinhard Hanuschik, QC Garching
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Operations Specialists Paranal [calChecker] [HC monitor] September 2013
Calibrations
CALIBs contain:• information about instrumental effects (ARC, FLAT, BIAS)• or atmospheric effects (STD flux, telluric)
SCIENCE reduction:• raw science calibrations with pipeline
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Operations Specialists Paranal [calChecker] [HC monitor] September 2013
Calibrations
CALIBs:• clean, specialized measurement of certain instrumental effect• principle: input known see what the instrument does with this
input know about instrument
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Operations Specialists Paranal [calChecker] [HC monitor] September 2013
Assumptions
Instrument is stable between night and daytime
• then: daytime calibrations sufficient
meaning: instrument conditions between day and night identical to acceptable level
if not (due to unexpected conditions): • science cannot be calibrated, lost
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Operations Specialists Paranal [calChecker] [HC monitor] September 2013
Criteria
Two important quality criteria on calibrations
1. Completeness
If CALIB missing, or earlier/later CALIB exists but is inapplicable:
SCIENCE cannot be calibrated
CALIB completeness saving SCIENCE from last night
provided by calChecker
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Operations Specialists Paranal [calChecker] [HC monitor] September 2013
Criteria
2. Quality
good quality valid measurement of instrumental conditions
valid: e.g. good flux and SNR
• overexposed flat: always bad• well-exposed ARC, but grating not in same position as for science:
bad
Also:• HC calibs check instrument status rather than individual science
CALIB quality ensures science of next night
provided by HC monitor
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Operations Specialists Paranal [calChecker] [HC monitor] September 2013
The big picture II
Where in the dataflow is QC and daytime calib checks?
What is done on Paranal and in Garching?
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Operations Specialists Paranal [calChecker] [HC monitor] September 2013
Garching
automatic process for every instrument:• calChecker every 30 minutes (tellTracker 15 min)• HC monitor every hour• running 24/7
output web pages identical for Garching (HQ) and Paranal (PL)• for convenience: mirror site ‘PL’ (replicated within 15 min)
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Operations Specialists Paranal [calChecker] [HC monitor] September 2013
Garching
QC scientists:• each is responsible for about 4 instruments• 5/7 schedule, daytime only • no shift system, no backups! If sick/travel: only automatic services• in charge of configuration and maintenance of these tools
• e.g. calibration plan, scoring system
• review of past day results• analysis of calChecker issues• analysis of red scores on HC monitor and AB monitor• produce master calibrations
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Operations Specialists Paranal [calChecker] [HC monitor] September 2013
Garching
If issues found:• fix them (if pipeline related), or ticket to developer
or• understand them (based on trending, experience etc.)
and• inform Paranal (mail, comment editors)
QC Garching has the first chance!
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Operations Specialists Paranal [calChecker] [HC monitor] September 2013
Paranal
Daytime 7/7:• review (double-check) calChecker and HC monitor, to fill gaps
(weekends, issues in Garching evening/night) • react on Garching signals, coordinate actions, PPRS• pro-active: discover issues (never rely 100% on QC Garching, the
QC scientist might be sick or on holiday)• but no need for duplication:
if all scores are green, you can continue with the next instrument
no need for visual checks (unless HC system incomplete)! much better: check product monitors (P…) for details
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Operations Specialists Paranal [calChecker] [HC monitor] September 2013
Ideal workflow to check calChecker I
Daytime 7/7:
• calScores green all ok, done, next instrument!
• don’t forget cal4cal• don’t forget long-term calibrations• calScores red investigate
MISS, NOK: check if calOb queue wasinterrupted/stopped restart
• if yellow: wait for end of daytime calib, no need to check earlier!
• nighttime CALIB missing check with OB grade, USD, QCG
• provide your analysis text: very useful!
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Operations Specialists Paranal [calChecker] [HC monitor] September 2013
Ideal workflow to check calChecker II
analysis editor:• choose flag (MISS, NOK, OK)• enter comment• your email address• submit
to be taken into account upon next execution (within ≤ 30min)
• contact QC
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Operations Specialists Paranal [calChecker] [HC monitor] September 2013
Ideal workflow to check HC monitor IHC instrument score:• green/OK all ok, done, next instrument• red/NOK find reports (navigation or ‘score
overview’)check scores and reportscheck comments, ‘Report news’
• understand origin, enter ‘Report news’, contact QC
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Operations Specialists Paranal [calChecker] [HC monitor] September 2013
Ideal workflow to check HC monitor IIuseful info for understanding issues:• plots• ‘Report news’• QC comments from the product
pages• earlier HC plots (history)• tutorial (QC docu)
Don’t hesitate to provide your own comments under ‘edit’!
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Operations Specialists Paranal [calChecker] [HC monitor] September 2013
What to do if …
• red flags on calChecker?- analyze issue, take actions- e.g. science graded ‘C’, no issue: enter analysis, issue gets
flagged ‘OK’ (upon next execution)- MISS or NOK calibration take it, issue turns ‘OK’ upon next
execution
• calChecker outdated?- inform QC
• data transfer/NGAS access not working?- inform DHA
• also check out ‘HELP’
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Operations Specialists Paranal [calChecker] [HC monitor] September 2013
What to do if …
• red scores on HC monitor?- analyze issue- if you think the instrumental issue is gone: take
another calibration; score will automatically turn green if true (within an hour or less)
- provide comment ‘Report news’
• often: page still cached press ‘Ctrl+Shift+R’ to refresh page
• HC monitor outdated (older than 24 hours)?- inform QC
• Find more under ‘HELP’
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Operations Specialists Paranal [calChecker] [HC monitor] September 2013
What to do if …
• red flag for ‘parser’ or ‘ftp’ on HC monitor?- page still cached? press ‘Ctrl+Shift+R’ to
refresh page- if real issue: inform QC
• comment editor used but comment not visible?- page still cached? press ‘Ctrl+Shift+R’ - might take up to 15 minutes until replication to
‘PL’