{"id":39,"date":"2015-03-21T08:33:58","date_gmt":"2015-03-21T08:33:58","guid":{"rendered":"http:\/\/www.oceanblogs.org\/eadsm\/?p=39"},"modified":"2015-04-02T09:06:10","modified_gmt":"2015-04-02T09:06:10","slug":"so239-deploying-the-dos-lander-11-51-n-117-0-w","status":"publish","type":"post","link":"https:\/\/www.oceanblogs.org\/eadsm\/2015\/03\/21\/so239-deploying-the-dos-lander-11-51-n-117-0-w\/","title":{"rendered":"SO239: Deploying the DOS Lander (11\u00b0 51\u2019 N, 117\u00b0 0\u2019 W)"},"content":{"rendered":"<p><em>(Deutsche Version s.u.)<\/em> After eight days of transit we reached our first station in the German licensing area. Shortly after our arrival the DOS Lander (Deep Sea Observatory System) was deployed for its first of two missions.\u00a0 The possibility to use different sets of measurement devices makes the DOS Lander a flexible platform for longer observations of the ocean floor.<br \/>\nBesides of a sediment trap and various instruments to measure water temperature, salinity, current and turbidity it is equipped with a stereographic camera system to take high resolution images of the ocean floor. The cameras and flashes are looking slightly downward in front of the lander. The frame rate was set to shoot images simultaneously every five minutes. Since we have two images from the same time point and with a big overlap, 3D-Models of the scene can be calculated later.<br \/>\nThe night before the deployment Henri Robert came up with the idea to also put one of his amphipod traps in front of the camera system.\u00a0 Quickly the lander was extended using a couple of wooden sticks, cable ties and several meters of duct tape to fix the amphipod trap on the lander. Even though we weren\u2019t 100% sure if we ever see the trap again, we stayed optimistic and kept our fingers crossed. The first deployment ended after one week in 4115m water depth and luckily Henri\u2019s trap was still attached when the lander arrived on deck. Immediately afterwards we had a first look at the images. Obviously, the amphipod trap was a big attraction for the local community. It took only 10 minutes after the arrival on the sea bottom and the first fish, shrimps and of course amphipods appeared.\u00a0 We took around 1500 images during the first deployment with each camera. The images got annotated by our biologists on board. In the meantime the lander was prepared for its next mission only one day later. Batteries were charged and new configurations selected. Right now the DOS Lander is back on the ocean floor collecting data again. This mission will take two months and the lander will be recovered during the next Sonne cruise.<\/p>\n<div id=\"attachment_43\" style=\"width: 1010px\" class=\"wp-caption alignleft\"><a href=\"http:\/\/www.oceanblogs.org\/eadsm\/wp-content\/uploads\/sites\/34\/2015\/04\/TheDOSLanderCameraSystem.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-43\" class=\"wp-image-43 size-full\" src=\"http:\/\/www.oceanblogs.org\/eadsm\/wp-content\/uploads\/sites\/34\/2015\/04\/TheDOSLanderCameraSystem.jpg\" alt=\"Die Ausstatung des DOS-Landers \/ Equipment of the DOS Lander. Photo: Tim Weiss\" width=\"1000\" height=\"750\" srcset=\"https:\/\/www.oceanblogs.org\/eadsm\/wp-content\/uploads\/sites\/34\/2015\/04\/TheDOSLanderCameraSystem.jpg 1000w, https:\/\/www.oceanblogs.org\/eadsm\/wp-content\/uploads\/sites\/34\/2015\/04\/TheDOSLanderCameraSystem-300x225.jpg 300w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><p id=\"caption-attachment-43\" class=\"wp-caption-text\">Die Ausstatung des DOS-Landers \/ Equipment of the DOS Lander. Photo: Tim Weiss<\/p><\/div>\n<p>&nbsp;<\/p>\n<div id=\"attachment_42\" style=\"width: 1034px\" class=\"wp-caption alignnone\"><a href=\"http:\/\/www.oceanblogs.org\/eadsm\/wp-content\/uploads\/sites\/34\/2015\/04\/SO-239-H.ROBERT-RBINS-DOS-Depl..jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-42\" class=\"wp-image-42 size-full\" src=\"http:\/\/www.oceanblogs.org\/eadsm\/wp-content\/uploads\/sites\/34\/2015\/04\/SO-239-H.ROBERT-RBINS-DOS-Depl..jpg\" alt=\"Aussetzen des DOS-Landers \/ Deployment of the DOS-Lander. Photo: Henri Robert\" width=\"1024\" height=\"685\" srcset=\"https:\/\/www.oceanblogs.org\/eadsm\/wp-content\/uploads\/sites\/34\/2015\/04\/SO-239-H.ROBERT-RBINS-DOS-Depl..jpg 1024w, https:\/\/www.oceanblogs.org\/eadsm\/wp-content\/uploads\/sites\/34\/2015\/04\/SO-239-H.ROBERT-RBINS-DOS-Depl.-300x200.jpg 300w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><p id=\"caption-attachment-42\" class=\"wp-caption-text\">Aussetzen des DOS-Landers \/ Deployment of the DOS-Lander. Photo: Henri Robert<\/p><\/div>\n<div id=\"attachment_41\" style=\"width: 1034px\" class=\"wp-caption alignnone\"><a href=\"http:\/\/www.oceanblogs.org\/eadsm\/wp-content\/uploads\/sites\/34\/2015\/04\/Shrimp02Small.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-41\" class=\"wp-image-41 size-full\" src=\"http:\/\/www.oceanblogs.org\/eadsm\/wp-content\/uploads\/sites\/34\/2015\/04\/Shrimp02Small.jpg\" alt=\"Tiefseegarnele vor dem DOS-Lander \/ Deep-sea shrimp in front of the DOS-Lander. Photo: DOS-Lander\" width=\"1024\" height=\"683\" srcset=\"https:\/\/www.oceanblogs.org\/eadsm\/wp-content\/uploads\/sites\/34\/2015\/04\/Shrimp02Small.jpg 1024w, https:\/\/www.oceanblogs.org\/eadsm\/wp-content\/uploads\/sites\/34\/2015\/04\/Shrimp02Small-300x200.jpg 300w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><p id=\"caption-attachment-41\" class=\"wp-caption-text\">Tiefseegarnele vor dem DOS-Lander \/ Deep-sea shrimp in front of the DOS-Lander. Photo: DOS-Lander<\/p><\/div>\n<p><em>Nach acht Tagen Transitzeit haben wir inzwischen unser erstes Arbeitsgebiet erreicht. Gleich nach unserer Ankunft wurde der DOS Lander (Deep Sea Observatory System) f\u00fcr seine erste Mission vorbereitet und ausgesetzt. Das DOS Lander System ist eine flexible Plattform f\u00fcr die unterschiedlichsten Messger\u00e4te und eignet sich sehr gut f\u00fcr Langzeitbeobachtungen am Meeresgrund.<\/em><br \/>\n<em>Neben einer Sedimentfalle und verschiedenen Instrumenten zur Bestimmung von Wassertemperatur, Salinit\u00e4t, Str\u00f6mungsgeschwindigkeiten und Tr\u00fcbe besitzt der Lander auch ein stereographisches Kamerasystem, um hochaufl\u00f6sende Bilder vom Meeresboden aufzunehmen. Die Kameras und Blitze sind leicht schr\u00e4g nach vorne auf den Meeresboden gerichtet. Die Bildwiederholrate wurde so eingestellt, dass die Kameras alle f\u00fcnf Minuten gleichzeitig ein Bild aufnehmen. Durch die zeitgleiche Ausl\u00f6sung und der relativ gro\u00dfen \u00dcberschneidung der Bilder lassen sich sp\u00e4ter 3D Modelle berechnen.<\/em><br \/>\n<em>Am Abend vor dem Aussetzen des Landers kam Henri Robert auf die Idee eine seiner Amphipodenfallen vor dem Kamera System zu installieren. Kurz darauf wurde die Falle mit Hilfe von Holzlatten, Kabelbindern und einigen Metern Klebeband am Lander befestigt.\u00a0 Auch wenn wir nicht zu 100% sicher waren, ob wir diese Falle jemals wieder zu Gesicht bekommen w\u00fcrden blieben wir optimistisch und dr\u00fcckten die Daumen. Nach einer Woche auf einer Wassertiefe von 4115m wurde der Lander wieder eingeholt. Gl\u00fccklicherweise war Henri\u2019s Falle noch an ihrem Platz. Sofort wurde mit der Auswertung der Bilder begonnen. Die Amphipodenfalle war mit ihrem K\u00f6der offensichtlich eine gro\u00dfe Attraktion f\u00fcr die Bewohner in der n\u00e4heren Umgebung. Es dauerte nur 10 Minuten nach Ankunft am Meeresboden bis die ersten Fische, Schrimps und Amphipoden auftauchten. In einer Woche wurden pro Kamera ca. 1500 Bilder aufgenommen, die von unseren Biologen bereits an Bord\u00a0 annotiert und anschlie\u00dfend in einem zentralen Datenarchiv gespeichert wurden. In der Zwischenzeit wurde der Lander f\u00fcr seinen n\u00e4chsten Einsatz vobereitet. Daf\u00fcr wurden die Batterien geladen und neue Konfigurationen ausgew\u00e4hlt. Schon am n\u00e4chsten Tag ging der Lander abermals \u00fcber Bord. Diese Mission dauert diesmal zwei Monate und der DOS Lander wird erst w\u00e4hrend der n\u00e4chsten Sonne Fahrt wieder eingeholt.<\/em><\/p>\n<p>Tim Wei\u00df, GEOMAR<\/p>\n<p>(Weiter Nachrichten von der Expedition\u00a0 SO237 gibt es im <a title=\"Senckenberg-Blog\" href=\"http:\/\/www.senckenberg.de\/root\/index.php?page_id=5201\">Blog der Senckenberg-Gesellschaft<\/a> \/More <span id=\"result_box\" class=\"\" lang=\"en\"> <span class=\"hps\">news<\/span> from <span class=\"hps\">the expedition<\/span> <span class=\"hps\">SO237 <\/span>in <span class=\"hps\">the <a title=\"Senckenberg Blog\" href=\"http:\/\/www.senckenberg.de\/root\/index.php?page_id=5201\">blog of the<\/a><\/span><a title=\"Senckenberg Blog\" href=\"http:\/\/www.senckenberg.de\/root\/index.php?page_id=5201\"> <span class=\"hps\">Senckenberg<\/span> <span class=\"hps\">Society)<\/span><\/a><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>(Deutsche Version s.u.) After eight days of transit we reached our first station in the German licensing area. Shortly after our arrival the DOS Lander (Deep Sea Observatory System) was deployed for its first of two missions.\u00a0 The possibility to use different sets of measurement devices makes the DOS Lander a flexible platform for longer [&hellip;]<\/p>\n","protected":false},"author":117,"featured_media":44,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"class_list":["post-39","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-marine-resources"],"_links":{"self":[{"href":"https:\/\/www.oceanblogs.org\/eadsm\/wp-json\/wp\/v2\/posts\/39","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.oceanblogs.org\/eadsm\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.oceanblogs.org\/eadsm\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.oceanblogs.org\/eadsm\/wp-json\/wp\/v2\/users\/117"}],"replies":[{"embeddable":true,"href":"https:\/\/www.oceanblogs.org\/eadsm\/wp-json\/wp\/v2\/comments?post=39"}],"version-history":[{"count":4,"href":"https:\/\/www.oceanblogs.org\/eadsm\/wp-json\/wp\/v2\/posts\/39\/revisions"}],"predecessor-version":[{"id":47,"href":"https:\/\/www.oceanblogs.org\/eadsm\/wp-json\/wp\/v2\/posts\/39\/revisions\/47"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.oceanblogs.org\/eadsm\/wp-json\/wp\/v2\/media\/44"}],"wp:attachment":[{"href":"https:\/\/www.oceanblogs.org\/eadsm\/wp-json\/wp\/v2\/media?parent=39"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.oceanblogs.org\/eadsm\/wp-json\/wp\/v2\/categories?post=39"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.oceanblogs.org\/eadsm\/wp-json\/wp\/v2\/tags?post=39"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}