New method maps 21cm cosmological structures to ~100m reflection scales for HERA-like and EDGES-like instruments, showing near-field beam calibration is required.
and Das, Santanu and Yan, Ruibin and He, Jiachen and Calvin, Osinga
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The primary beam of the Tianlai array is shown to be factorizable into independent E-W and N-S components, with E-W profiles measured from the Sun and N-S obtained via sky model fitting.
citing papers explorer
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Mapping Cosmological Signal Scales to Beam Calibration Requirements in 21cm Experiments and Implications for Near-Field Measurement
New method maps 21cm cosmological structures to ~100m reflection scales for HERA-like and EDGES-like instruments, showing near-field beam calibration is required.
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Measuring Tianlai's primary beam using sky model
The primary beam of the Tianlai array is shown to be factorizable into independent E-W and N-S components, with E-W profiles measured from the Sun and N-S obtained via sky model fitting.