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: http://www.eso.org/observing/dfo/quality/ALL/
Дата изменения: Unknown Дата индексирования: Mon Apr 11 04:57:31 2016 Кодировка: Поисковые слова: deep sky |
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All VLT/VLTI data are transferred over the internet to the Garching NGAS archive. From there they are retrieved by QC Garching. Calibration data usually have a very small delivery delay, often just a few minutes. QC Garching processes new calibration data in order to derive information about the health of the instruments. This is done in an automatic, incremental way: once per hour, 24 hours a day, 7 days a week. The quality information is derived in form of QC1 parameters. These parameters are trended and scored. Scoring is an evaluation against configured thresholds and provides a simple but sensitive feedback: green means all is OK, red means there might be a problem. The Health Check monitor collects QC1 parameters and their scores. It does not aim at completeness but is focusing on the critical instrument components. The results are presented in two views: the graphical HEALTH CHECK monitor with the full trending reports, and the QUICK-LOOK monitor with scores. They are connected through the links HC plot... and scores&comments... .
The Health Check Monitor is a joint effort of the Quality Control Group in Garching and of Paranal Science Operations. The tool is meant to be regularly checked by both partners. Process. The Health Check process is fed by calibrations that measure key instrument components ("Health Check calibrations"). They are taken regularly, in many cases daily. They are pipeline processed by QC Garching in an automatic process that is triggered every hour. The pipelines derive QC1 parameters which are stored in a database. Some more advanced QC1 parameters are derived by post-pipeline QC procedures and added to the database. The most recent QC1 values are trended, that means plotted together with a historical data set (often the last 90 days). Scoring. The trending is supported by scoring, a process in which a new parameter is evaluated against configured thresholds. These thresholds can be fixed (e.g. specifications), or relative (like +/- 10% around the median as calculated from the trending). Trending plots. The Health Check monitor offers access to the following trending plots:
QC1 database. You can download the QC1 parameters, and also connect to the QC1 database. Tutorial. Most plots have a corresponding tutorial page linked as tutorial. Some supporting information is available under This plot. The statistical result of each plot and each data set are listed in the result table. The process behind the Health Check Monitor is documented in more detail here.
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