altazimuth farâzâ-sugân Fr.: altazimutal 1) A → mounting for → telescopes
that permits both → vertical and
→ horizontal → rotation. Altazimuth, from alt(itude) + → azimuth. |
altazimuth coordinate system râžmân-e hamârâhâ-ye farâzâ-sugân Fr.: coordonnées azimutales The coordinate system in which the position of a body on the → celestial sphere is described with respect to an observer's → celestial horizon and → zenith. The coordinates of a point in this system are its → altitude on the → vertical circle, and its → azimuth westward (clockwise) along the celestial horizon from the observer's south. Same as → horizon coordinate system. → altazimuth; → coordinate; → system. |
altazimuth instrument sâzâl-e farâzâ-sugâni Fr.: instrument altazimutal A telescope that moves vertically along the → altitude circle of a celestial body and horizontally along its → azimuth circle. → altazimuth; → instrument. |
altazimuth mounting barnešând-e farâzâ-sugân Fr.: monture altazimutale A → telescope mounting which has its two axes of movement aligned with the → horizon and the → zenith. |