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@INPROCEEDINGS{Drabent:874406,
author = {Drabent, Alexander and Hoeft, Matthias and Mechev, Alex B.
and Oonk, J. B. Raymond and Shimwell, Timothy W. and
Sweijen, Frits and Danezi, Anatoli and Schrijvers, Coen and
Manzano, Cristina and Tsigenov, Oleg and Dettmar,
Ralf-Jürgen and Brüggen, Marcus and Schwarz, Dominik J.},
title = {{R}ealising the {LOFAR} {T}wo-{M}etre {S}ky {S}urvey},
volume = {50},
address = {Jülich},
publisher = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
reportid = {FZJ-2020-01416},
series = {Publication Series of the John von Neumann Institute for
Computing (NIC) NIC Series},
pages = {113 - 122},
year = {2020},
comment = {NIC Symposium 2020},
booktitle = {NIC Symposium 2020},
abstract = {The new generation of high-resolution broad-band radio
telescopes, like the Low Frequency Array (LOFAR), produces,
depending on the level of compression, between 1 to 10 TB of
data per hour after correlation. Such a large amount of
scientific data demand powerful computing resources and
efficient data handling strategies to be mastered. The LOFAR
Two-metre Sky Survey (LoTSS) is a Key Science Project (KSP)
of the LOFAR telescope. It aims to map the entire northern
hemisphere at unprecedented sensitivity and resolution. The
survey consist of 3 168 pointings, requiring about 30 PBytes
of storage space. As a member of the German Long Wavelength
Consortium (GLOW) the Forschungszentrum Jülich (FZJ) stores
in the Long Term Archive (LTA) about $50\%$ of all LoTSS
observations conducted to date. In collaboration with
SURFsara in Amsterdam we developed service tools that
enables the KSP to process LOFAR data stored in the LTA at
the Jülich Supercomputing Centre (JSC) in an automated and
robust fashion. Through our system more than 500 out of 800
existing LoTSS observationshave already been processed with
the prefactor pipeline. This pipeline calibrates the
direction-independent instrumental and ionospheric effects
and furthermore reduces the data size significantly. For
continuum imaging, this processing pipeline is the standard
pipeline that is executed before more advanced processing
and image reconstruction methods are applied.},
month = {Feb},
date = {2020-02-27},
organization = {NIC Symposium 2020, Jülich (Germany),
27 Feb 2020 - 28 Feb 2020},
cin = {NIC / JSC},
cid = {I:(DE-Juel1)NIC-20090406 / I:(DE-Juel1)JSC-20090406},
pnm = {513 - Supercomputer Facility (POF3-513)},
pid = {G:(DE-HGF)POF3-513},
typ = {PUB:(DE-HGF)8 / PUB:(DE-HGF)7},
url = {https://juser.fz-juelich.de/record/874406},
}