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- W2975684211 abstract "We study the behavior of internal signal chain reflections and antenna cross coupling as systematics for 21 cm cosmological surveys. We outline the mathematics for how these systematics appear in interferometric visibilities and describe their phenomenology. We then describe techniques for modeling and removing these systematics without attenuating the 21 cm signal in the data. This has critical implications for low-frequency radio surveys aiming to characterize the 21cm signal from the Epoch of Reionization and Cosmic Dawn, as systematics can cause bright foreground emission to contaminate the EoR window and prohibit a robust detection. We also quantify the signal loss properties of the systematic modeling algorithms, and show that our techniques demonstrate resistance against EoR signal loss. In a companion paper, we demonstrate these methods on data from the Hydrogen Epoch of Reionization Array as a proof-of-concept." @default.
- W2975684211 created "2019-10-03" @default.
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- W2975684211 date "2019-09-25" @default.
- W2975684211 modified "2023-10-16" @default.
- W2975684211 title "Mitigating Internal Instrument Coupling I: Temporal and Spectral Modeling" @default.
- W2975684211 hasPublicationYear "2019" @default.
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