Sentence:  The measurements made with the NRL 50 - foot reflector , which is altitude <WSD>azimuth</WSD> mounted , would have shown a systematic change with local hour angle in the measured intensities of Venus and Jupiter if a substantial part of the radiation had been linearly polarized . 
Meaning of the word marked with <WSD> tags:  the azimuth of a celestial body is the angle between the vertical plane containing it and the plane of the meridian