Abstract
The BaR-SPOrt experiment, a project to measure the linearly polarised emission at 32 GHz and 90 GHz of 20°×20° sky patches from a stratospheric balloon, is presented. It consists of correlation polarimeters for direct measurements of Q and U Stokes parameters, coupled to off-axis optics providing a beam of 0°.5 - 0°.2. The scientific goals as well as the instrument design are described. Particular emphasis is put on the hardware solutions adopted to reduce the systematics effects in high sensitivity polarisation measurements.
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Macculi, C., Bernardi, G., Carretti, E., Cecchini, S., Cortiglioni, S., Morelli, E., … Nicastro, L. (2001). Bar-sport: Balloon-borne radiometer for sky polarisation observations. In European Space Agency, (Special Publication) ESA SP (pp. 463–468). https://doi.org/10.1007/10857580_65
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