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- W3107300823 abstract "ABSTRACT We modelled the two major layer of Earth’s ionosphere, the F-layer and the D-layer, by a simplified spatial model with temporal variance to study the chromatic ionospheric effects on global 21-cm observations. From the analyses, we found that the magnitude of the ionospheric disruptions due to ionospheric refraction and absorption can be greater than the expected global 21-cm signal, and the variation of its magnitude can differ, depending on the ionospheric conditions. Within the parameter space adopted in the model, the shape of the global 21-cm signal is distorted after propagating through the ionosphere, while its amplitude is weakened. It is observed that the ionospheric effects do not cancel out over time, and thus should be accounted for in the foreground calibration at each timestep to account for the chromaticity introduced by the ionosphere." @default.
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- W3107300823 date "2021-02-19" @default.
- W3107300823 modified "2023-09-30" @default.
- W3107300823 title "Quantifying ionospheric effects on global 21-cm observations" @default.
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- W3107300823 doi "https://doi.org/10.1093/mnras/stab429" @default.
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