{"id":40279,"date":"2015-11-24T22:55:33","date_gmt":"2015-11-24T22:55:33","guid":{"rendered":"http:\/\/ahay.org\/blog\/?p=40279"},"modified":"2015-11-24T22:55:33","modified_gmt":"2015-11-24T22:55:33","slug":"ground-roll-noise-attenuation-using-local-orthogonalization","status":"publish","type":"post","link":"https:\/\/ahay.org\/blog\/2015\/11\/24\/ground-roll-noise-attenuation-using-local-orthogonalization\/","title":{"rendered":"Ground-roll noise attenuation using local orthogonalization"},"content":{"rendered":"<p>A new paper is added to the <a href=\"\/wiki\/Reproducible_Documents\">collection of reproducible documents<\/a>: <a href=\"\/RSF\/book\/tccs\/orthogroll\/paper_html\/\">Ground-roll noise attenuation using a simple and effective approach based on local bandlimited orthogonalization<\/a><\/p>\n<p><img decoding=\"async\" src=\"\/RSF\/book\/tccs\/orthogroll\/field\/Fig\/field.png\" alt=\"\" title=\"\" \/> <img decoding=\"async\" src=\"\/RSF\/book\/tccs\/orthogroll\/field\/Fig\/field-ortho-0.png\" alt=\"\" title=\"\" \/> <img decoding=\"async\" src=\"\/RSF\/book\/tccs\/orthogroll\/field\/Fig\/dif-ortho-0.png\" alt=\"\" title=\"\" \/><\/p>\n<blockquote>\n<p>Bandpass filtering is a common way to estimate ground-roll noise on land seismic data, because of the relatively low frequency content of ground-roll. However, there is usually a frequency overlap between ground-roll and the desired seismic reflections that prevents bandpass filtering alone from effectively removing ground-roll without also harming the desired reflections. We apply a bandpass filter with a relatively high upper bound to provide an initial, imperfect separation of ground-roll and reflection signal. We then apply a technique called &#8216;local orthogonalization&#8217; to improve the separation. The procedure is easily implemented, since it involves only bandpass filtering and a regularized division of the initial signal and noise estimates. We demonstrate the effectiveness of the method on an open-source set of field data.<\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>A new paper is added to the collection of reproducible documents: Ground-roll noise attenuation using a simple and effective approach based on local bandlimited orthogonalization Bandpass filtering is a common way to estimate ground-roll noise on land seismic data, because of the relatively low frequency content of ground-roll. However, there is usually a frequency overlap [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","activitypub_content_warning":"","activitypub_content_visibility":"local","activitypub_max_image_attachments":4,"activitypub_interaction_policy_quote":"","footnotes":""},"categories":[5],"tags":[],"class_list":["post-40279","post","type-post","status-publish","format-standard","hentry","category-documentation"],"_links":{"self":[{"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/posts\/40279","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/comments?post=40279"}],"version-history":[{"count":2,"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/posts\/40279\/revisions"}],"predecessor-version":[{"id":40284,"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/posts\/40279\/revisions\/40284"}],"wp:attachment":[{"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/media?parent=40279"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/categories?post=40279"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/tags?post=40279"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}