{"id":2369,"date":"2019-10-08T15:38:53","date_gmt":"2019-10-08T19:38:53","guid":{"rendered":"https:\/\/www2.whoi.edu\/site\/itp\/?page_id=2369"},"modified":"2021-07-20T13:23:05","modified_gmt":"2021-07-20T17:23:05","slug":"itp51-data-processing","status":"publish","type":"page","link":"https:\/\/www2.whoi.edu\/site\/itp\/data\/completed-missions\/itp51\/itp51-data-processing\/","title":{"rendered":"ITP 051 Data Processing"},"content":{"rendered":"\r\n\t<h1>ITP51 Data Processing<\/h1>\r\n\t<p>The 76 profiles that were transmitted from the ITP were processed according to the procedures described in the\u00a0<a href=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/08\/ITP_Data_Processing_Procedures_35803-1.pdf\">ITP Updated Data Processing Procedures<\/a>.\u00a0 The processing parameters for this ITP are shown in the figures to the right.<\/p>\r\n<p>Thermohaline staircases were available in the upper portion of the profiles (100-250dbar) to generate initial estimates for CTD lag corrections. Thermal lag estimates were relatively large, particular for the second half of the record, suggesting possible sensor or pump issues. They were manually increased further manually to reduce hysteresis between up- and down profiles. \u00a0The deeper portions were relatively noisy. This could again relate to sensor issues, but may at least in part be due to variability near the shelf break being different from the typical deep ITP data in the central gyre.<\/p>\r\n<p>During the second profile, the oxygen calibration &#8220;dorat&#8221; jumped from 1 to about 1.2, but subsequent profiles retained a realistic shape. A second jump to much larger jump occurred at profile 33 and lasted through profile 43, after which it precipitously back to near 1.2. Dorat values of close to 5 were unrealistic, as was the shape of these profiles, and they were edited out. The remainder of the record started with increased up\/down O2 differences, and the worst offenders were also edited out.<\/p>\r\n<p>See the Data Products tab to the left for descriptions of the three levels (I, II, III) of data processing and to access all data.<\/p>\r\n\t\t\t\t<a href=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp51loc2_453873.jpg\" target=\"_self\" rel=\"noopener noreferrer\">\r\n\t\t\t\t<img loading=\"lazy\" src=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp51loc2_453873.jpg\" alt=\"ITP Surface Buoy Status.\" height=\"1730\" width=\"1000\" title=\"itp51loc2_453873\" \/>\r\n\t\t\t\t<\/a>\r\n\t\tITP Surface Buoy Status.\r\n\t\t\t\t<a href=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp51dat1_453875.jpg\" target=\"_self\" rel=\"noopener noreferrer\">\r\n\t\t\t\t<img loading=\"lazy\" src=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp51dat1_453875.jpg\" alt=\"ITP profiler engineering data.\" height=\"1480\" width=\"1560\" title=\"itp51dat1_453875\" \/>\r\n\t\t\t\t<\/a>\r\n\t\tITP profiler engineering data.\r\n\t\t\t\t<a href=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp51final1_453877.jpg\" target=\"_self\" rel=\"noopener noreferrer\">\r\n\t\t\t\t<img loading=\"lazy\" src=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp51final1_453877.jpg\" alt=\"Top: number of bad points removed, Middle: variance of verticle difference of temperature and salinity in step region for up-going profiles, Bottom: temperature lag.\" height=\"2713\" width=\"2047\" title=\"itp51final1_453877\" \/>\r\n\t\t\t\t<\/a>\r\n\t\tTop: number of bad points removed, Middle: variance of verticle difference of temperature and salinity in step region for up-going profiles, Bottom: temperature lag.\r\n\t\t\t\t<a href=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp51final2_453777.jpg\" target=\"_self\" rel=\"noopener noreferrer\">\r\n\t\t\t\t<img loading=\"lazy\" src=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp51final2_453777.jpg\" alt=\"Top: conductivity lag, Middle: conductivity thermal mass amplitude correction, Bottom: conductivity thermal mass lag correction.\" height=\"2720\" width=\"2063\" title=\"itp51final2_453777\" \/>\r\n\t\t\t\t<\/a>\r\n\t\tTop: conductivity lag, Middle: conductivity thermal mass amplitude correction, Bottom: conductivity thermal mass lag correction.\r\n\t\t\t\t<a href=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp51final3_453893.jpg\" target=\"_self\" rel=\"noopener noreferrer\">\r\n\t\t\t\t<img loading=\"lazy\" src=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp51final3_453893.jpg\" alt=\"Top: down pressure deviation correction, Middle: salinity ratio adjustment, Bottom: Number of filtered spikes.\" height=\"2720\" width=\"2005\" title=\"itp51final3_453893\" \/>\r\n\t\t\t\t<\/a>\r\n\t\tTop: down pressure deviation correction, Middle: salinity ratio adjustment, Bottom: Number of filtered spikes.\r\n\t\t\t\t<a href=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp51final4_453757.jpg\" target=\"_self\" rel=\"noopener noreferrer\">\r\n\t\t\t\t<img loading=\"lazy\" src=\"https:\/\/www2.whoi.edu\/site\/itp\/wp-content\/uploads\/sites\/92\/2019\/10\/itp51final4_453757.jpg\" alt=\"Top: number of bad dissolved oxygen points removed, Middle: dissolved oxygen ratio adjustment, Bottom: number of filtered spikes.\" height=\"2732\" width=\"2017\" title=\"itp51final4_453757\" \/>\r\n\t\t\t\t<\/a>\r\n\t\tTop: number of bad dissolved oxygen points removed, Middle: dissolved oxygen ratio adjustment, Bottom: number of filtered spikes.\r\n","protected":false},"excerpt":{"rendered":"<p>ITP51 Data Processing The 76 profiles that were transmitted from the ITP were processed according to the procedures described in the\u00a0ITP Updated Data Processing Procedures.\u00a0 The processing parameters for this ITP are shown in the figures to the right. Thermohaline staircases were available in the upper portion of the profiles (100-250dbar) to generate initial estimates&hellip;<\/p>\n","protected":false},"author":83,"featured_media":0,"parent":2356,"menu_order":2,"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\/2369"}],"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=2369"}],"version-history":[{"count":3,"href":"https:\/\/www2.whoi.edu\/site\/itp\/wp-json\/wp\/v2\/pages\/2369\/revisions"}],"predecessor-version":[{"id":3594,"href":"https:\/\/www2.whoi.edu\/site\/itp\/wp-json\/wp\/v2\/pages\/2369\/revisions\/3594"}],"up":[{"embeddable":true,"href":"https:\/\/www2.whoi.edu\/site\/itp\/wp-json\/wp\/v2\/pages\/2356"}],"wp:attachment":[{"href":"https:\/\/www2.whoi.edu\/site\/itp\/wp-json\/wp\/v2\/media?parent=2369"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}