Unlocking the LOFAR LTA
Unlocking the LOFAR LTA
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解锁 LOFAR LTA
DOI：
10.1109/escience.2019.00061
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
J. Maassen
中科院分区：
文献类型：
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作者：
H. Spreeuw;S. Madougou;R. Haren;Berend Weel;A. Belloum;J. Maassen
在本文中，我们讨论了我们在“解锁”LOFAR 射电望远镜长期档案（LTA）方面所做的努力。这是一个大型 (> 43 PB) 档案，每年通过吸收新的观察结果而扩展约 7 PB。它由粗略校准的“可见性”组成，即来自 LOFAR 站的信号之间的相关性。目前，LOFAR LTA 中只有一小部分包含大多数天文研究所需的天空图。不幸的是，由于观测数据的大小以及所涉及软件的复杂性和计算要求，创建这样的天空图可能具有挑战性。我们尝试通过为该档案的任何用户启用简单的一键式将 LOFAR 观测结果还原为天空图来解决此问题。这项工作是作为 PROCESS 1 项目的一部分进行的，该项目旨在为用户友好的百亿亿次数据处理提供通用的开源解决方案。
In this paper we discuss our efforts in "unlocking" the Long Term Archive (LTA) of the LOFAR radio telescope. This is a large (> 43 PB) archive that expands with about 7 PB per year by the ingestion of new observations. It consists of coarsely calibrated "visibilities", i.e. correlations between signals from LOFAR stations. Currently, only a small fraction of the LOFAR LTA consists of sky maps, which are needed for most astronomical research. Unfortunately, creating such sky maps can be challenging, due to the data sizes of the observations and the complexity and compute requirements of the software involved. We try to fix this by enabling a simple one-click-reduction of LOFAR observations into sky maps for any user of this archive. This work was performed as part of the PROCESS 1 project, which aims to provide generalizable open source solutions for user friendly exascale data processing.