Baker-Nunn Schmidt Camera

Japanese: ベーカー=ナン・カメラ(英語表記)Baker-Nunn Schmidt Camera
Baker-Nunn Schmidt Camera
This Schmidt camera was designed to track artificial satellites in the Vanguard Project of the International Geophysical Year. It has a 50cm aperture, a three-piece achromatic correction plate, and a 75cm diameter primary mirror, giving it a focal length of 50cm and a wide field of view with an aperture ratio of 1.5° x 30°, allowing it to measure the position of an artificial satellite with an accuracy of 1 arc second. It has three axes: azimuth, altitude, and tracking, and can photograph the 15cm diameter Vanguard 1 satellite at a distance of 5000km. 15 units have been manufactured and are in use around the world. [Tomita Koichiro]

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
国際地球観測年のバンガード計画の人工衛星追跡用に設計されたシュミットカメラ。口径50cm,3枚構成の色消補正板,直径75cmの主鏡の組合せで焦点距離50cm,口径比1,5゜×30゜の広い写野で,人工衛星の位置を1秒角の精度で測定できる。方位,高度,追尾の3軸をもち,距離5000kmで直径15cmのバンガード1号衛星が撮影できる。15台製作され世界各地で使用されている。【冨田 弘一郎】

出典 株式会社平凡社世界大百科事典 第2版について 情報

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