![\"\"](\"https:\/\/bollerandchivens.com\/wp-content\/uploads\/2011\/11\/Baker.Nunn_.-time.elements.Norman.Clock_.Green_.Bay_.WI_.300dpi.jpg\" "\\"Baker.Nunn_.-time.elements.Norman.Clock_.Green_.Bay_.WI_.300dpi\\"")
<\/a>This is the first of three Air Force Baker-Nunn Cameras.\nOn the left is a Standard Time clock built by Norman Clock Co, Green Bay, Wisconsin<\/p>\n
The Baker Nunn Cameras are designed to have a triangular base.\u00a0 Mounted on the base is a Fork rotating 360 degrees. A Gimbal Ring is mounted to the Fork tines ends that will rotate plus or minus 80 degrees in elevation.
\nMounted on the center of the Gimbal Ring is the Optical Camera assembly.
\nThe Optical Camera assembly can be motor driven plus or minus 70 degrees in a 2nd elevation axis that is 90 degree to the 1st elevation axis.
\nThe total moving mount is balanced such the it can be positioned to track across any satellite angular direction in the sky<\/p>\n
Both the Azimuth and Elevation rotations are electrically motor-driven.<\/p>\n
The satellite camera can be operated in a standard Alta\/Azimuth mount.
\nAn alternate condition where the camera mount base rear support can be raised up with a ball screw jack.
\nThis allowed its azimuth axis to be tilted to a polar axis angle where its North\/South location is to located on its final installation.
\nAn adjustable tubular column is installed to lock the mount in this angular position.
\nThis angular position allows the camera to place a celestial background photo of stars when a satellite photo was taken.
\nBoth the Azimuth and Elevation rotations are electrically motor-driven.
\nThe satellite camera can be operated in a standard Alta\/Azimuth mount.<\/p>\n
Mounted on the center of the gimbal ring is the optical camera assembly. The Optical Configuration<\/strong> The Mechanical Operation<\/strong> Continuously, a pair of rotating shutter blades is passing around the film bridge, which will create clear stripes in the exposed image trail of the traveling satellite photo. A selectable speed worm and gear drive will drive the camera assembly tracking a satellite passing overhead.<\/p>\n Selectable transporting speeds can be implemented for tracking different satellite transit speeds.<\/p>\n Simultaneously an International time signal clock from the Norman Clock Co, Green Bay, Wisconsin is located at each Baker Nunn Satellite Tracking station. The Air Force Baker Nunn Satellite Tracking Cameras were similar to the Smithsonian Satellite Tracking Cameras. This is the first of three Air Force Baker-Nunn Cameras. On the left is a Standard Time clock built by Norman Clock Co, Green Bay, Wisconsin The Baker Nunn Cameras are designed to have a triangular base.\u00a0 Mounted on […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"class_list":["post-1451","post","type-post","status-publish","format-standard","hentry","category-bakernunn"],"_links":{"self":[{"href":"https:\/\/bollerandchivens.com\/index.php?rest_route=\/wp\/v2\/posts\/1451","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bollerandchivens.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bollerandchivens.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bollerandchivens.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bollerandchivens.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1451"}],"version-history":[{"count":9,"href":"https:\/\/bollerandchivens.com\/index.php?rest_route=\/wp\/v2\/posts\/1451\/revisions"}],"predecessor-version":[{"id":2629,"href":"https:\/\/bollerandchivens.com\/index.php?rest_route=\/wp\/v2\/posts\/1451\/revisions\/2629"}],"wp:attachment":[{"href":"https:\/\/bollerandchivens.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1451"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bollerandchivens.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1451"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bollerandchivens.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1451"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nThe optical camera assembly can be motor driven plus or minus 70 degrees in a 2nd<\/sup> elevation axis that is 90 degree to the 1st<\/sup> elevation axis.
\nThe total moving mount is balanced such the it can be positioned to track across any angular direction in the sky<\/p>\n
\nThe Baker Nunn Satellite Tracking Cameras consists of a three-element 20-inch entrance aperture corrector lens system.
\nThe corrected image is projected down to a 31-inch f\/1 spherical primary mirror.
\nThe focusing converging image is then reflected back up to an optical shaped focusing surfaced back-up plate where the film exposure are made.<\/p>\n
\nFor a satellite photo run with the Baker Nunn camera the following operations occur.
\nThe Satellite Tracking Cameras consists a continuous 35-mm length of film coming from a supply canister.
\nThe film is stopped for an exposure at the center of the film bridge and is then stretched over the optical shaped surface on a backup plate. The stretching of the film will place the emulsion surface of the film in focus over the total width and length of the films exposure.
\nThe film is then transported out to a take-up canister stopping with its trailing length ready for the next exposure.<\/p>\n
\nContinuously, another complete shutter is opening and closing, is blocking unwanted exposure during the film transport.<\/p>\n
\nA time signal will be projected on the end of each exposure of the film.<\/p>\n","protected":false},"excerpt":{"rendered":"