Sentence:  Measurements at 3.15 cm were obtained on 11 days spread over the interval May 3 to June 19 , 1956 , <WSD>using</WSD> the 50 - foot reflector at the U.S. Naval Research Laboratory in Washington . 
Meaning of the word marked with <WSD> tags:  put into service; make work or employ for a particular purpose or for its inherent or natural purpose