{"id":7921,"date":"2024-12-14T19:21:15","date_gmt":"2024-12-14T15:21:15","guid":{"rendered":"https:\/\/cosmo.yerphi.am\/?page_id=7921"},"modified":"2025-01-10T14:43:42","modified_gmt":"2025-01-10T10:43:42","slug":"dragon","status":"publish","type":"page","link":"https:\/\/cosmo.yerphi.am\/index.php\/dragon\/","title":{"rendered":"DRAGON: Orbital UV Telescope"},"content":{"rendered":"<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"color: #000000;\"><strong><span style=\"font-family: arial, helvetica, sans-serif; font-size: 18pt;\">Scientific supervisor G. Gurzadyan<\/span><\/strong><\/span><\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt; color: #000000;\">The DRAGON project was developed in 1973-1978 under the leadership of G.A. Gurzadyan to obtain spectral images of the starry sky using a wide-angle 900 mm telescope. An objective prism was located at the telescope entrance as a dispersing element. To ensure high quality shooting, it was installed on a three-axis stabilized platform.\u00a0In this case, it was planned to use precise KAMERTON star sensors developed at KOMZ within the framework of the PROCION project.<\/span><\/p>\n<p style=\"text-align: justify;\">\u00a0<\/p>\n<ul>\n<li style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt; color: #000000;\">The goal of the project is spectral images of areas of the sky with a resolution of up to 18 magnitude.<\/span><\/li>\n<li style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif;\"><span style=\"font-size: 14pt; color: #000000;\">Telescope &#8211; Schmidt system; <\/span><span style=\"font-size: 14pt; color: #000000;\">Main mirror, diameter &#8211; 800 mm.<\/span><\/span><\/li>\n<li style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt; color: #000000;\">Image registration is on UV photographic film.<\/span><\/li>\n<li style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt; color: #000000;\">Stabilization by two reference stars by rotating a bunch of star sensors and a photo cassette relative to the center of curvature of the main mirror.<\/span><\/li>\n<li style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt; color: #000000;\">Three-axis gimbal &#8211; on elastic hinges with precision wave gears and a ball screw mechanism.<\/span><\/li>\n<li style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt; color: #000000;\">Tracking accuracy \u00b1 2&#8243;.<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\">\u00a0<\/p>\n<hr style=\"height: 2px; border-width: 0; color: gray; background: gray;\" \/>\n<p style=\"text-align: center;\"><span style=\"font-size: 18pt; color: #000000;\"><strong><span style=\"font-family: arial, helvetica, sans-serif;\">Basic parameters of the optical design<\/span><\/strong><\/span><\/p>\n<p><a href=\"https:\/\/cosmo.yerphi.am\/wp-content\/uploads\/2024\/12\/dr-01-1-2m.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-8932\" src=\"https:\/\/cosmo.yerphi.am\/wp-content\/uploads\/2024\/12\/dr-01-1-2m.jpg\" alt=\"\" width=\"700\" height=\"269\" srcset=\"https:\/\/cosmo.yerphi.am\/wp-content\/uploads\/2024\/12\/dr-01-1-2m.jpg 640w, https:\/\/cosmo.yerphi.am\/wp-content\/uploads\/2024\/12\/dr-01-1-2m-300x115.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><\/p>\n<table style=\"border-collapse: collapse; width: 100%;\">\n<tbody>\n<tr>\n<td style=\"width: 15%;\">\u00a0<\/td>\n<td style=\"width: 42.6923%;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt;\">Optical design Schmidt<\/span><br \/>\n<span style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt;\">Spectral range 800-3800 A<\/span><br \/>\n<span style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt;\">Inlet diameter 600 mm<\/span><br \/>\n<span style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt;\">Focal length 1500 mm<\/span><br \/>\n<span style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt;\">Relative aperture 1:2.5<\/span><br \/>\n<span style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt;\">Field of view 4.7 degrees<\/span><br \/>\n<span style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt;\">Image diameter, mm 120<\/span><\/td>\n<td style=\"width: 27.3077%;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt;\">Main mirror diameter 900 mm\u00a0<\/span><br \/>\n<span style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt;\">Prism angle 2 degrees<\/span><br \/>\n<span style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt;\">Linear dispersion, A\/mm<\/span><br \/>\n<span style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt;\"> at wavelength<\/span><br \/>\n<span style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt;\">&#8211; 1900 A 120<\/span><br \/>\n<span style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt;\">&#8211; 2500 A 330<\/span><br \/>\n<span style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt;\">&#8211; 3000 A 650<\/span><\/td>\n<td style=\"width: 15%;\">\u00a0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr style=\"height: 2px; border-width: 0; color: gray; background: gray;\" \/>\n<p>&nbsp;<\/p>\n<table style=\"border-collapse: collapse; width: 100%; height: auto;\">\n<tbody>\n<tr>\n<td style=\"width: 65%; height: auto;\"><a href=\"https:\/\/cosmo.yerphi.am\/wp-content\/uploads\/ height: auto;024\/12\/dra-02.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-8943 size-full\" style=\"margin-top: 0px; margin-bottom: 0px;\" src=\"https:\/\/cosmo.yerphi.am\/wp-content\/uploads\/2024\/12\/dra-02.jpg\" alt=\"\" width=\"1200\" height=\"650\" srcset=\"https:\/\/cosmo.yerphi.am\/wp-content\/uploads\/2024\/12\/dra-02.jpg 1200w, https:\/\/cosmo.yerphi.am\/wp-content\/uploads\/2024\/12\/dra-02-300x163.jpg 300w, https:\/\/cosmo.yerphi.am\/wp-content\/uploads\/2024\/12\/dra-02-1024x555.jpg 1024w, https:\/\/cosmo.yerphi.am\/wp-content\/uploads\/2024\/12\/dra-02-768x416.jpg 768w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/a><\/td>\n<td style=\"width: 35%; height: auto;\"><a href=\"https:\/\/cosmo.yerphi.am\/wp-content\/uploads\/2024\/12\/dra-03.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-8944 size-full\" style=\"margin-top: 0px; margin-bottom: 0px;\" src=\"https:\/\/cosmo.yerphi.am\/wp-content\/uploads\/2024\/12\/dra-03.jpg\" alt=\"\" width=\"650\" height=\"650\" srcset=\"https:\/\/cosmo.yerphi.am\/wp-content\/uploads\/2024\/12\/dra-03.jpg 650w, https:\/\/cosmo.yerphi.am\/wp-content\/uploads\/2024\/12\/dra-03-300x300.jpg 300w, https:\/\/cosmo.yerphi.am\/wp-content\/uploads\/2024\/12\/dra-03-150x150.jpg 150w, https:\/\/cosmo.yerphi.am\/wp-content\/uploads\/2024\/12\/dra-03-230x230.jpg 230w, https:\/\/cosmo.yerphi.am\/wp-content\/uploads\/2024\/12\/dra-03-365x365.jpg 365w\" sizes=\"auto, (max-width: 650px) 100vw, 650px\" \/><\/a><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 65%; text-align: center;\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Design of the DRAGON telescope<\/span><\/td>\n<td style=\"width: 35%; text-align: center;\"><span style=\"font-family: arial, helvetica, sans-serif; color: #000000;\">Block diagram of the DRAGON telescope stabilization system<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr style=\"height: 2px; border-width: 0; color: gray; background: gray;\" \/>\n<p style=\"text-align: justify;\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt; color: #000000;\">It was assumed that a specialized automatic satellite would be created on the basis of the SOYUZ spacecraft, conducting the experiment in autonomous mode and docking with a manned orbital station only to replace photo cassettes or to carry out repair and maintenance work. <\/span><span style=\"font-family: arial, helvetica, sans-serif; font-size: 14pt; color: #000000;\">At the preliminary design stage, a working prototype was developed and manufactured in Garni, albeit in a version with a 500 mm mirror. Unfortunately, for a number of reasons, including financial reasons, the work was suspended and then closed altogether.<\/span><\/p>\n<figure id=\"attachment_8945\" aria-describedby=\"caption-attachment-8945\" style=\"width: 640px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cosmo.yerphi.am\/wp-content\/uploads\/2024\/12\/dra-04.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-8945\" style=\"margin-top: 0px; margin-bottom: 0px;\" src=\"https:\/\/cosmo.yerphi.am\/wp-content\/uploads\/2024\/12\/dra-04.jpg\" alt=\"Technological model of the DRAGON observatory\" width=\"640\" height=\"437\" srcset=\"https:\/\/cosmo.yerphi.am\/wp-content\/uploads\/2024\/12\/dra-04.jpg 798w, https:\/\/cosmo.yerphi.am\/wp-content\/uploads\/2024\/12\/dra-04-300x205.jpg 300w, https:\/\/cosmo.yerphi.am\/wp-content\/uploads\/2024\/12\/dra-04-768x525.jpg 768w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/a><figcaption id=\"caption-attachment-8945\" class=\"wp-caption-text\"><span style=\"font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000;\">Technological model of the DRAGON observatory<\/span><\/figcaption><\/figure>\n<p style=\"text-align: justify;\">\u00a0<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; &nbsp; Scientific supervisor G. Gurzadyan &nbsp; The DRAGON project was developed in 1973-1978 under the leadership of G.A. Gurzadyan to obtain spectral images of the starry sky using a wide-angle 900 mm telescope. An objective prism was located at<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_lmt_disableupdate":"no","_lmt_disable":"no","footnotes":""},"class_list":["post-7921","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/cosmo.yerphi.am\/index.php\/wp-json\/wp\/v2\/pages\/7921","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cosmo.yerphi.am\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/cosmo.yerphi.am\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/cosmo.yerphi.am\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cosmo.yerphi.am\/index.php\/wp-json\/wp\/v2\/comments?post=7921"}],"version-history":[{"count":0,"href":"https:\/\/cosmo.yerphi.am\/index.php\/wp-json\/wp\/v2\/pages\/7921\/revisions"}],"wp:attachment":[{"href":"https:\/\/cosmo.yerphi.am\/index.php\/wp-json\/wp\/v2\/media?parent=7921"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}