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rta-dq-lib: a software library to perform online data quality analysis of scientific data

Date Issued
2022
Author(s)
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Gilles Maurin
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Thomas Vuillaume
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Pierre Aubert
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Emilio Garcia
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Antonio Zoccoli
DOI
Abstract
The Cherenkov Telescope Array (CTA) is an initiative that is currently building the largest gamma-ray ground Observatory that ever existed. A Science Alert Generation (SAG) system, part of the Array Control and Data Acquisition (ACADA) system of the CTA Observatory, analyses online the telescope data arriving at an event rate of tens of kHz - to detect transient gamma-ray events. The SAG system also performs an online data quality analysis to assess the instruments' health during the data acquisition: this analysis is crucial to confirm good detections. A Python and a C++ software library to perform the online data quality analysis of CTA data, called rta-dq-lib, has been proposed for CTA. The Python version is dedicated to the rapid prototyping of data quality use cases. The C++ version is optimized for maximum performance. The library allows the user to define, through XML configuration files, the format of the input data and, for each data field, which quality checks must be performed and which types of aggregations and transformations must be applied. It internally translates the XML configuration into a direct acyclic computational graph that encodes the dependencies of the computational tasks to be performed. This model allows the library to easily take advantage of parallelization at the thread level and the overall flexibility allow us to develop generic data quality analysis pipelines that could also be reused in other applications.
Coverage
Astronomical Data Analysis Software and Systems XXX
All editors
Ruiz, Jose Enrique; Pierfedereci, Francesco; Teuben, Peter
Series
Volume
532
Conferenece
Astronomical Data Analysis Software and Systems XXX
Conferenece place
virtual
Conferenece date
8-12 November 2020
Uri
Url
Issn Identifier
1050-3390
Ads BibCode
2022ASPC..532..365B
Rights
open.access
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