hour angle

時角、相位角

學術名詞

• 時角：天文學、測量學、航空太空、氣象學、機械工程、土木工程
• 時角[天]：力學

英文釋義

1. the angular distance along the celestial equator from the observer's meridian to the hour circle of a given celestial body
2. (astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascension for an observer at a particular location and time of day