Millimeter-wave polarization angle calibration using UAV-based sources

Rolando Dünner; Juan Fluxá; Sergio Best; Felipe Carrero

doi:10.1117/12.2561165

13 December 2020 Millimeter-wave polarization angle calibration using UAV-based sources

Rolando Dünner, Juan Fluxá, Sergio Best, Felipe Carrero

Proceedings Volume 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X; 114532P (2020) https://doi.org/10.1117/12.2561165
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

Experiments to measure the polarization of the CMB require an exquisite characterization and control of optical systematics to achieve their scientific goals. Unfortunately, there are only very few natural polarized calibration sources, for which an artificial source becomes an appealing alternative. Here we present the development of a polarized calibration source that can be mounted on a drone to illuminate telescopes at a distance and away from the ground loading. We implemented a 150 GHz coherent source, with a single selectable linear polarization, fixed frequency and electronic chopper at 10 Hz. The source position is measured to better than 2 cm and 0.05 degrees using photogrammetry and a differential GPS. This source can be used to measure the polarized beam shape, relative and absolute polarization angles and map far sidelobes.

Conference Presentation

Citation Download Citation

Rolando Dünner, Juan Fluxá, Sergio Best, and Felipe Carrero "Millimeter-wave polarization angle calibration using UAV-based sources", Proc. SPIE 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X, 114532P (13 December 2020); https://doi.org/10.1117/12.2561165

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