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Experimental Astronomy

, Volume 45, Issue 3, pp 351–362 | Cite as

Antenna data storage concept for phased array radio astronomical instruments

  • André W. Gunst
  • Gert H. Kruithof
Original Article
  • 38 Downloads

Abstract

Low frequency Radio Astronomy instruments like LOFAR and SKA-LOW use arrays of dipole antennas for the collection of radio signals from the sky. Due to the large number of antennas involved, the total data rate produced by all the antennas is enormous. Storage of the antenna data is both economically and technologically infeasible using the current state of the art storage technology. Therefore, real-time processing of the antenna voltage data using beam forming and correlation is applied to achieve a data reduction throughout the signal chain. However, most science could equally well be performed using an archive of raw antenna voltage data coming straight from the A/D converters instead of capturing and processing the antenna data in real time over and over again. Trends on storage and computing technology make such an approach feasible on a time scale of approximately 10 years. The benefits of such a system approach are more science output and a higher flexibility with respect to the science operations. In this paper we present a radically new system concept for a radio telescope based on storage of raw antenna data. LOFAR is used as an example for such a future instrument.

Keywords

Antenna arrays Software-defined instruments Astronomy Telescopes Architecture Signal processing Radio astronomy Big data 

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Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  1. 1.The Netherlands Institute for Radio Astronomy (ASTRON)Dwingeloothe Netherlands

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