>Fabio Paonessa et al., "In-situ Verification of Aperture-Array Polarimetric Performance by means of a Micro UAV: Preliminary Results on the LOFAR Low Band Antenna", URSI Atlantic Radio Science Conference (AT-RASC), Gran Canaria (Spain), 28 May - 1 June 2018.
In order to assess the polarimetric performance of phased
arrays for radio astronomy, the Intrinsic Crosspolarization
Ratio (IXR) can be adopted as a figure of
merit. An innovative technique employing an Unmanned
Aerial Vehicle (UAV) to measure the IXR of
low-frequency instruments (VHF/UHF bands) has been
recently exploited on a station of the Low Frequency
Array (LOFAR) radio telescope. We present results from
a spin flight measurement demonstrating 35 dB IXR in
boresight, a value close to the performance limits of the
current measurement system.
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