Sentence:  The measurements made with the NRL 50 - foot reflector , which is altitude azimuth mounted , would have shown a systematic change with local <WSD>hour</WSD> 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 angular distance along the celestial equator from the observer's meridian to the hour circle of a given celestial body