Calibration aspects of the APAR antenna unit

APAR, an acronym for active phased array radar, is a Canadian-Dutch-German program. APAR underlies the MFR scenarios within the NATO Anti-Air Warfare System (NAAWS), in which all three partners have been co-operating. The system integration and testing of the engineering and development model (EDM) at factory has been concluded. The calibration of the antenna unit in the anechoic test chamber has been a major activity, which provided new insight into the behaviour of the antenna during the calibration process.