# Design, implementation, and qualification of high-performance time and frequency reference for the MeerKAT telescope (Erratum)

Johan Petrus Burger, Renier Siebrits, Romeo Reginald Gunther Gamatham, Geomarr van Tonder, Grant Adams, Vereesé van Tonder, Zwivhuya Ramudzuli, Sarah Buchner, Michel Abgrall, Pierre Uhrich, et al.

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Johan Petrus Burger, Renier Siebrits, Romeo Reginald Gunther Gamatham, Geomarr van Tonder, Grant Adams, et al. Design, implementation, and qualification of high-performance time and frequency reference for the MeerKAT telescope (Erratum). Journal of Astronomical Telescopes, Instruments, and Systems, 2022, 8, 10.1117/1.JATIS.8.1.019801. insu-03713036

HAL Id: insu-03713036

https://insu.hal.science/insu-03713036v1

Submitted on 25 Jul 2025

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<figure><img src="image_1.png" /></figure>

Distributed under a Creative Commons Attribution 4.0 International License
Design, implementation, and qualification of
high-performance time and frequency reference
for the MeerKAT telescope (Erratum)

Johan Petrus Burger,<sup>a,*</sup> Renier Siebrits,<sup>a</sup>

Romeo Reginald Gunther Gamatham,<sup>a</sup> Geomarr van Tonder,<sup>a</sup>

Grant Adams,<sup>b</sup> Vereesé van Tonder,<sup>b</sup> Zwivhuya Ramudzuli,<sup>b</sup>

Sarah Buchner,<sup>c</sup> Michel Abgrall,<sup>d</sup> Pierre Uhrich,<sup>d</sup> and Daniele Rovera<sup>d</sup>

[DOI: 10.1117/1.JATIS.8.1.019801]

This article [J. Astron. Telesc. Instrum. Syst. 8(1), 011013 (2022) https://doi.org/10.1117/1.JATIS.8.1.011013] was originally published with typographical errors in Figs. 3 and 10.

In Fig. 3, in the top blue block, an “approximately equal” sign should have been used instead of an equal sign. Additionally, the symbols #I and #J were confused by the authors. Therefore, the text should read $S'_i \approx (CLOCK-REF)$ for i = 1 to N instead of $S'_i = (CLOCK \ #J-REF)$ for i=1 to N. Later in the same sentence, the text should read “clock \#J” instead of “clock \#I.” The corrected figure is shown here.

<figure><img src="image_2.png" /><figcaption>Fig. 3</figcaption></figure>

<footnote><sup>a</sup>South African Radio Astronomy Observatory, Time and Frequency Systems Group, Engineering Division, Cape Town, South Africa</footnote>

<footnote><sup>b</sup>South African Radio Astronomy Observatory, Electronics Group, Engineering Division, Cape Town, South Africa</footnote>

<footnote><sup>c</sup>South African Radio Astronomy Observatory, Commissioning and Science Group, Science Division, Cape Town, South Africa</footnote>

<footnote><sup>d</sup>LNE-SYRTE, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Paris, France</footnote>

<footnote>*Address all correspondence to Johan Burger, jburger@sarao.ac.za</footnote>
<figure><img src="image_3.png" /><figcaption>Fig. 10</figcaption></figure>

In Fig. 10, the legend for the green line was incorrectly written as the quantity $(K_{GPS}^{(1)} - C_0)_{\text{Circular T, section 4}}$. The symbol C0 is, however, $C'_0$ in the paper's text, and the legend is incompatible with that. Therefore, the figure has been corrected to: $(K_{GPS}^{(1)} - C'_0)_{\text{Circular T, section 4}}$. The corrected figure is shown here.

The article was corrected on 21 January 2022.