The Mid-Frequency Square Kilometre Array Phase Synchronisation System

Sascha Schediwy, David Gozzard, Charles Gravestock, Simon Thomas Stobie, R. Whitaker, J.A. Malan, P. Boven, Keith Grainge

Research output: Contribution to journalArticle

Abstract

This paper describes the technical details and practical implementation of the phase synchronisation system selected for use by the Mid-Frequency Square Kilometre Array (SKA). Over a four-year period, the system has been tested on metropolitan fibre-optic networks, on long-haul overhead fibre at the South African SKA site, and on existing telescopes in Australia to verify its functional performance. The tests have shown that the system exceeds the 1-second SKA coherence loss requirement by a factor of 2560, the 60-second coherence loss requirement by a factor of 239, and the 10-minute phase drift requirement by almost five orders-of-magnitude. The paper also reports on tests showing that the system can operate within specification over all the required operating conditions, including maximum fibre link distance, temperature range, temperature gradient, relative humidity, wind speed, seismic resilience, electromagnetic compliance, frequency offset, and other operational requirements.
Original languageEnglish
Article number007
Number of pages10
JournalPublications of the Astronomincal Society of Australia (PASA)
Volume36
Publication statusPublished - 21 Feb 2019

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synchronism
requirements
fiber optics
resilience
temperature gradient
fibers
compliance
relative humidity
wind velocity
humidity
specifications
temperature gradients
telescopes
electromagnetism
temperature
fibre
loss
test

Cite this

Schediwy, Sascha ; Gozzard, David ; Gravestock, Charles ; Stobie, Simon Thomas ; Whitaker, R. ; Malan, J.A. ; Boven, P. ; Grainge, Keith . / The Mid-Frequency Square Kilometre Array Phase Synchronisation System. In: Publications of the Astronomincal Society of Australia (PASA). 2019 ; Vol. 36.
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The Mid-Frequency Square Kilometre Array Phase Synchronisation System. / Schediwy, Sascha; Gozzard, David; Gravestock, Charles; Stobie, Simon Thomas; Whitaker, R.; Malan, J.A.; Boven, P.; Grainge, Keith .

In: Publications of the Astronomincal Society of Australia (PASA), Vol. 36, 007, 21.02.2019.

Research output: Contribution to journalArticle

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