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		| Paper: | 
		LOFAR Calibration | 
	 
	
		| Volume: | 
		376, Astronomical Data Analysis Software and Systems XVI | 
	 
	
		| Page: | 
		237 | 
	 
	
		| Authors: | 
		Nijboer, R.J.; Noordam, J.E. | 
	 
	
	
		| Abstract: | 
		An overview of the calibration approach for LOFAR is presented. Due to the station beam shape and the effect of the ionosphere, LOFAR calibration is effectively a self-calibration for image-plane effects. Calibration of the data for these effects is achieved in a Major Cycle using both visibility data and image data. | 
	 
	
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