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The Receiver System for the Ooty Wide Field Array

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Abstract

The legacy Ooty Radio Telescope (ORT) is being reconfigured as a 264-element synthesis telescope, called the Ooty Wide Field Array (OWFA). Its antenna elements are the contiguous 1.92 m sections of the parabolic cylinder. It will operate in a 38-MHz frequency band centred at 326.5 MHz and will be equipped with a digital receiver including a 264-element spectral correlator with a spectral resolution of 48 kHz. OWFA is designed to retain the benefits of equatorial mount, continuous 9-hour tracking ability and large collecting area of the legacy telescope and use of modern digital techniques to enhance the instantaneous field-of-view by more than an order of magnitude. OWFA has unique advantages for contemporary investigations related to large scale structure, transient events and space weather watch. In this paper, we describe the RF subsystems, digitizers and fibre optic communication of OWFA and highlight some specific aspects of the system relevant for the observations planned during the initial operation.

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Acknowledgments

The authors would like to thank the members of the Radio Astronomy Laboratory at RRI (especially S. Kasturi and S. Sujatha) for help during the initial prototyping and design finalization. They also acknowledge the enthusiastic support received from the members of the Radio Astronomy Centre during the installation and commissioning of the systems in the field. CRS and PKM wish to acknowledge the financial support from ISRO for the project.

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Authors and Affiliations

  1. Raman Research Institute, C.V. Raman Avenue, Sadashivnagar, Bengaluru, 560 080, India

    C. R. SUBRAHMANYA, P. PRASAD, B. S. GIRISH & R. SOMASHEKAR

  2. Radio Astronomy Centre, NCRA-TIFR, P.O. Box 8, Ooty, 643 001, India

    P. K. MANOHARAN & A. K. MITTAL

Authors
  1. C. R. SUBRAHMANYA
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  2. P. PRASAD
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  3. B. S. GIRISH
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  4. R. SOMASHEKAR
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  5. P. K. MANOHARAN
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  6. A. K. MITTAL
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Corresponding author

Correspondence to P. K. MANOHARAN.

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SUBRAHMANYA, C.R., PRASAD, P., GIRISH, B.S. et al. The Receiver System for the Ooty Wide Field Array. J Astrophys Astron 38, 11 (2017). https://doi.org/10.1007/s12036-017-9434-0

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  • DOI: https://doi.org/10.1007/s12036-017-9434-0

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