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astro-ph.IM2023
The Effects of the Local Environment on a Compact Radio Interferometer I: Cross-coupling in the Tianlai Dish Pathfinder Array
Juhun Kwak, John Podczerwinski, Peter Timbie +10
The visibilities measured by radio astronomical interferometers include non-astronomical correlated signals that arise from the local environment of the array. These correlated sig…
astro-ph.CO2023
Needlet Karhunen-Loève (NKL): A Method For Cleaning Foregrounds From 21cm Intensity Maps
John Podczerwinski, Peter Timbie
This paper introduces a technique called NKL, which cleans both polarized and unpolarized foregrounds from HI intensity maps by applying a Karhunen-Loève transform on the needlet c…
astro-ph.IM2023
Design of an Ultra-Wideband Antenna Feed and Reflector for use in Hydrogen Intensity Mapping Interferometers
Podczerwinski, Timbie
This paper describes the design of a 5.5:1 bandwidth feed antenna and reflector system, intended for use in hydrogen intensity mapping experiments. The system is optimized to reduc…