Baker-Nunn Camera definition of Baker-Nunn Camera in the Free Online Encyclopedia.

Baker-Nunn camera [¦bāk·ər ¦nən ′kam·rə]

(optics)

A large camera with a Schmidt-type lens system used to track earth satellites.

Baker-Nunn Camera

an apparatus for photographing artificial earth satellites against the background of stars; it is also called a satellite camera. The optical system is the Schmidt system with a tricomponent correcting system; the diameter of the correcting lens measures 508 mm, and the aperture ratio is 1:1. The focal surface is almost spherical in shape; the angular dimensions of the frame are 5 × 30°. The camera is mounted on a base having vertical, horizontal, and orbital axes. Such a system permits the optical axis of the camera to inscribe any large circle with an angular velocity ranging from 0 to 7,000’’/sec. The shutter is of an obturator type, and its performance is registered to an accuracy of 0.0001 sec. The satellite’s position is registered on a photograph to an accuracy of 2–3’’. The camera is named after the American firms that manufacture the optical and mechanical parts of the instrument (J. Baker and J. Nunn, respectively). It was constructed in the USA in 1957 by F. L. Whipple and J. A. Hynek.

Mentioned in	?		Encyclopedia browser	?		Full browser	?
No references found			Baker, Dame Janet Baker, Edward Dickinson Baker, Ella Josephine Baker, George Baker, George F. Baker, George Fisher Baker, George Pierce Baker, Hobey Baker, Howard H., Jr. Baker, Howard Henry, Jr. Baker, James A., III Baker, James Addison, 3d Baker, Josephine Baker, Newton Baker, Newton D Baker, Newton Diehl Baker, Norma Jean Baker, Oliver Baker, Oliver Edwin Baker, Paul T. Baker, Ray Stannard Baker, Russell Baker, Sara Josephine Baker, Sir Benjamin Baker, Sir Samuel White Baker-Nunn Camera Baker-Schmidt telescope bakerite bakers' yeast Bakersfield Bakery, Automated Bakewell Bakewell, Robert Bakh, Aleksei Bakh, Aleksei Nikolaevich Bakhapcha Bakharden Bakharev, Nikita Bakhari Bakhchisarai Bakhchisarai, Peace Treaty of 1681 Bakhchisaray Bakhchivandzhi, Grigorii Bakhchivandzhi, Grigorii Iakovlevich Bakhirev, Viacheslav Bakhirev, Viacheslav Vasilevich Bakhlulzade, Sattar Bakhlul Ogly Bakhmach Bakhmaniar, Abulgasan Marzuban Ogly Bakhmaro Bakhmetev, Porfirii			Baker, George F. Baker, George Fisher Baker, George Pierce Baker, Harris & Young Baker, Hobey Baker, Howard H., Jr. Baker, Howard Henry, Jr. Baker, James A., III Baker, James Addison, 3d Baker, Josephine Baker, Josephine Baker, Newton Baker, Newton D Baker, Newton Diehl Baker, Norma Jean Baker, Norma Jean Baker, Oliver Baker, Oliver Edwin Baker, Paul T. Baker, Ray Stannard Baker, Russell Baker, Sara Josephine Baker, Sir Benjamin Baker, Sir Samuel White Baker-Campbell-Hausdorff Relation Baker-legged Baker-Nunn Camera Baker-Schmidt telescope baker’s dozen Bakeria Bakerian mimicry Bakerian mimicry Bakerian mimicry Bakerian mimicry bakeries bakerite Bakerlite Bakerlite Bakerloo Syndrome Bakers Bakers Bakers dozen Bakers dozen Bakers Food & Allied Workers Union Bakers Man Productions, Inc Bakers yeast Bakers' Dozen Bakers' Dozen bakers' itch bakers' itch bakers' itch bakers' itch Bakers' yeast Bakers' yeast Bakers' yeast Bakersfield Bakersfield