S Yatawatta - Monthly Notices of the Royal Astronomical Society, 2022 - academic.oup.com
Direction-dependent calibration of widefield radio interferometers estimates the systematic errors, along with multiple directions in the sky. This is necessary because with most …
S Yatawatta - arXiv preprint arXiv:2401.04428, 2024 - arxiv.org
A fundamental assumption of the data model used in radio interferometric calibration is that the sky model only consists of compact and discrete radio sources. This assumption breaks …
In this paper we present a methodology for creating a system design for radio telescopes based on a fixed cost budget. This methodology builds on the idea to optimize a figure of …
Precision calibration poses challenges to experiments probing the redshifted 21-cm signal of neutral hydrogen from the Cosmic Dawn and Epoch of Reionization (z∼ 30–6). In both …
AA Iyer, GM Prabhu, T Gupta… - Journal of Physics …, 2023 - iopscience.iop.org
Cost optimization is a common problem encountered in the design of telescopes. This paper comprehensively discusses various radio telescope designs worldwide, focusing on their …
V Ollier, MN El Korso, A Ferrari… - … on Acoustics, Speech …, 2018 - ieeexplore.ieee.org
This paper investigates calibration of sensor arrays in the radio astronomy context. Current and future radio telescopes require computationally efficient algorithms to overcome the new …
S Yatawatta, F Diblen… - 2017 IEEE 7th International …, 2017 - ieeexplore.ieee.org
Distributed radio interferometric calibration based on consensus optimization has been shown to improve the estimation of systematic errors in radio astronomical observations. The …
Aims. We describe a scalable distributed imaging algorithm framework for next-generation radio telescopes, managing the Fourier transform from apertures to sky (or vice versa) with a …
Accurate calibration is of critical importance for new advanced interferometric systems in radio astronomy in order to recover high resolution images with no distortions. This process …