{"id":349,"date":"2011-08-19T20:34:49","date_gmt":"2011-08-19T20:34:49","guid":{"rendered":"http:\/\/bollerandchivens.com\/?p=349"},"modified":"2014-05-29T13:24:55","modified_gmt":"2014-05-29T13:24:55","slug":"site-survey-telescope","status":"publish","type":"post","link":"https:\/\/bollerandchivens.com\/?p=349","title":{"rendered":"Site Survey Telescope"},"content":{"rendered":"<p><a href=\"https:\/\/bollerandchivens.com\/wp-content\/uploads\/2011\/09\/BC.site_.survey.ts_.300dpi.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-777\" title=\"B&amp;C.site.survey.ts.300dpi\" src=\"https:\/\/bollerandchivens.com\/wp-content\/uploads\/2011\/09\/BC.site_.survey.ts_.300dpi-800x1024.jpg\" alt=\"\" width=\"584\" height=\"747\" srcset=\"https:\/\/bollerandchivens.com\/wp-content\/uploads\/2011\/09\/BC.site_.survey.ts_.300dpi-800x1024.jpg 800w, https:\/\/bollerandchivens.com\/wp-content\/uploads\/2011\/09\/BC.site_.survey.ts_.300dpi-234x300.jpg 234w\" sizes=\"auto, (max-width: 584px) 100vw, 584px\" \/><\/a>The observer was Ed Fengler; Boller and Chivens master instrument assembler.<br \/>\nAt a meeting hosted by Bill Baustian of Kitt Peak National Observatory, a discussion was entered into for the need of small, portable lightweight duel-beam optical telescope.<br \/>\nBill Baustian sketched a blackboard rendering of which Don Winans of Boller and Chivens took a Polaroid photo. From that blackboard sketch, Don Winans of Boller and Chivens designed the instrument.<br \/>\nBoller and Chivens manufactured 8 to 10 of these site-survey telescopes.<br \/>\nThe telescope would be designed specifically for determining the seeing conditions in the selection of possible observatory sites. It needed to be lightweight to be transported possibility by pack animals and easy to repeat set-ups at that site for different seasonal surveys.<br \/>\nA 40\u201d separation was selected as the nominal diameter in determining the minimum observing window area for acceptable air current disturbances.<br \/>\nThe instrument would gather two images of a selected star. The two incoming star image beam paths at 40\u201d apart with each beam passing through an optical flat turning mirror.<br \/>\nA pair of 6\u201d objective lens combined each of the two star images at a common focal point.<br \/>\nA single eyepiece would have the two images in its field of view.<br \/>\nThese two images would then be focused on a clear reticule plate with circular scribed diameters of<br \/>\n2-sec, 4-sec and 6-sec of arc separations.<br \/>\nWhen the instrument was setup at a selected site, the amount of moving deviations of the double star images on the reticule would be recorded<br \/>\nReturning at later time, again observations would determine how stable the observing was at that site and would be recorded and compared from different seasons.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The observer was Ed Fengler; Boller and Chivens master instrument assembler. At a meeting hosted by Bill Baustian of Kitt Peak National Observatory, a discussion was entered into for the need of small, portable lightweight duel-beam optical telescope. Bill Baustian sketched a blackboard rendering of which Don Winans of Boller and Chivens took a Polaroid [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-349","post","type-post","status-publish","format-standard","hentry","category-support-instruments"],"_links":{"self":[{"href":"https:\/\/bollerandchivens.com\/index.php?rest_route=\/wp\/v2\/posts\/349","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=349"}],"version-history":[{"count":9,"href":"https:\/\/bollerandchivens.com\/index.php?rest_route=\/wp\/v2\/posts\/349\/revisions"}],"predecessor-version":[{"id":2705,"href":"https:\/\/bollerandchivens.com\/index.php?rest_route=\/wp\/v2\/posts\/349\/revisions\/2705"}],"wp:attachment":[{"href":"https:\/\/bollerandchivens.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=349"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bollerandchivens.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=349"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bollerandchivens.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=349"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}