{"id":931,"date":"2019-08-27T12:13:02","date_gmt":"2019-08-27T16:13:02","guid":{"rendered":"https:\/\/www2.whoi.edu\/site\/itp\/?page_id=931"},"modified":"2023-12-12T12:31:37","modified_gmt":"2023-12-12T16:31:37","slug":"itp-2-deployment","status":"publish","type":"page","link":"https:\/\/www2.whoi.edu\/site\/itp\/data\/completed-missions\/itp-2\/itp-2-deployment\/","title":{"rendered":"ITP 002 Deployment"},"content":{"rendered":"\r\n

ITP2 Deployment Operations<\/h1>\r\n

The day prior to the deployment of the ITP\/IMB a multiyear ice floe approximately 500 m by 500 m characterized by dirty snow was spotted from the ship, the helicopter was flown onto the floe, and two test holes were bored through the ice using a 2″ diameter hand auger to determine the thickness (3.8 and 4.0 m).<\/p>\r\n

The following morning, the deployment operation began at 6 AM local time (CDT) with the transportation in light fog of an ice party of eight and all gear to the selected site in three helicopter flights and two slingloads.\u00a0\u00a0Drilling the 11″ diameter hole through the ice for the installation of the ITP profiler was the most difficult part of the ITP deployment.\u00a0\u00a0Midway through the 4 m ice, the old hard ice became softer and more porous so that embedded seawater turned the ice shavings into slush, and the 10″ diameter flutes had difficulty removing the material.\u00a0\u00a0To complete the drilling, the deployment tripod assembled and the auger hung from a chainfall, so that the drilling could proceed at a controlled rate with reduced labor.<\/p>\r\n

The hole was finally completely drilled by 7:30, with 50 cm of freeboard above the seawater.\u00a0\u00a0In the next two hours, the anchor weight and wire rope (with bottom bumper) were smoothly deployed, and then the ITP profiler was attached, and easily passed through the 11″ hole, the 800 m wire rope was deployed, and the surface package attached to the tether.\u00a0\u00a0Subsequent communications with the underwater inductive modem through the surface package using a laptop computer confirmed that the inductive modem circuit between the profiler and surface package was operation.\u00a0\u00a0\u00a0The surface package was situated over the hole, the tripod was removed, and a wooden platform was constructed beneath the buoy.\u00a0\u00a0By 10 AM local time (15:00 UTC), the ITP deployment was complete.<\/p>\r\n

Simultaneously, the IMB was being installed approximately 10 meters away.\u00a0\u00a0One 11″ diameter hole was drilled 1 m deep to encase the surface package, and three 4″ diameter holes through the ice for the ice sensors.\u00a0\u00a0The thermistor hole was in 4 m thick ice with 20 cm of freeboard.\u00a0\u00a0Where the snow sensor was located, there was initially 5.5 cm of snow.\u00a0\u00a0At 10 AM, the operation of the IMB was verified using a Campbell keypad to check memory locations.\u00a0\u00a0Clean up and covering of the cables continued for next half hour, and all personnel and cargo were returned to the ship by 11 AM.\u00a0\u00a0Later, messages from shore laboratories confirmed that both buoys were operating properly.<\/p>\r\n

More information and pictures of the deployment are also available\u00a0here<\/a>\u00a0and at:\u00a0https:\/\/www.whoi.edu\/page.do?pid=68316<\/a>.<\/p>\r\n

\"John <\/a> John Kemp and Rick Krishfield handle the auger, while Kris Newhall operates the chainfall while boring an 11″ diameter hole through the 4 m thick ice floe. (Photo by Sarah Zimmermann.) \"Rick <\/a> Rick Krishfield attaches the inductive modem coupling to the ITP 2 profiler prior to lowering the instrument through the ice. (Photo by Sarah Zimmermann.) \"Andrew <\/a> Andrew Hamilton reads from the instructions, while Doug Sieberg and Rick Krishfield install the ice thermistor chains for the IMB. (Photo by Sarah Zimmermann.) \"The <\/a> The deployment team behind ITP 2 and next to IMB after deployment: Andrew Hamilton, John Kemp, Gary Morgan, Rick Krishfield, Andrew Kaiser, Doug Sieberg, and Kris Newhall. (Photo by Sarah Zimmermann.)<\/p>\r\n","protected":false},"excerpt":{"rendered":"

ITP2 Deployment Operations The day prior to the deployment of the ITP\/IMB a multiyear ice floe approximately 500 m by 500 m characterized by dirty snow was spotted from the ship, the helicopter was flown onto the floe, and two test holes were bored through the ice using a 2″ diameter hand auger to determine…<\/p>\n","protected":false},"author":83,"featured_media":0,"parent":925,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"tpl-sidebar.php","meta":{"advanced-sidebar-menu\/link-title":"","advanced-sidebar-menu\/exclude-page":false},"_links":{"self":[{"href":"https:\/\/www2.whoi.edu\/site\/itp\/wp-json\/wp\/v2\/pages\/931"}],"collection":[{"href":"https:\/\/www2.whoi.edu\/site\/itp\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www2.whoi.edu\/site\/itp\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www2.whoi.edu\/site\/itp\/wp-json\/wp\/v2\/users\/83"}],"replies":[{"embeddable":true,"href":"https:\/\/www2.whoi.edu\/site\/itp\/wp-json\/wp\/v2\/comments?post=931"}],"version-history":[{"count":3,"href":"https:\/\/www2.whoi.edu\/site\/itp\/wp-json\/wp\/v2\/pages\/931\/revisions"}],"predecessor-version":[{"id":4426,"href":"https:\/\/www2.whoi.edu\/site\/itp\/wp-json\/wp\/v2\/pages\/931\/revisions\/4426"}],"up":[{"embeddable":true,"href":"https:\/\/www2.whoi.edu\/site\/itp\/wp-json\/wp\/v2\/pages\/925"}],"wp:attachment":[{"href":"https:\/\/www2.whoi.edu\/site\/itp\/wp-json\/wp\/v2\/media?parent=931"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}