{"id":344,"date":"2013-08-02T15:21:00","date_gmt":"2013-08-02T15:21:00","guid":{"rendered":"http:\/\/ahay.org\/blog\/?p=344"},"modified":"2015-08-31T02:58:54","modified_gmt":"2015-08-31T02:58:54","slug":"program-of-the-month-sfai2refl","status":"publish","type":"post","link":"https:\/\/ahay.org\/blog\/2013\/08\/02\/program-of-the-month-sfai2refl\/","title":{"rendered":"Program of the month: sfai2refl"},"content":{"rendered":"<p><a href=\"\/RSF\/sfai2refl.html\">sfai2refl<\/a> converts acoustic impedance to normal-incidence PP reflectivity using the simple equation<br \/>\n$$R(t) = \\frac{I(t+\\Delta t) &#8211; I(t)}{I(t+\\Delta t) + I(t)}$$<\/p>\n<p>The program is useful for convolution modeling. The following example from <a href=\"\/RSF\/book\/rsf\/rsf\/wedge.html\">rsf\/rsf\/wedge<\/a> shows a classic example of wedge modeling, which is used for analyzing the tuning phenomenon (Kallweit, R. and L. Wood, 1982, The limits of resolution of zero-phase wavelets: Geophysics, v. 47, 1035\u0096-1046.)<\/p>\n<p><img decoding=\"async\" src=\"\/RSF\/book\/rsf\/rsf\/wedge\/Fig\/wedge.png\" alt=\"\" title=\"\" \/> <img decoding=\"async\" src=\"\/RSF\/book\/rsf\/rsf\/wedge\/Fig\/wseis.png\" alt=\"\" title=\"\" \/> <\/p>\n<p>A more sophisticated example from <a href=\"\/RSF\/book\/geo384w\/hw5\/sigsbee2.html\">geo384w\/hw5\/sigsbee2<\/a> computes an effective reflectivity of the Sigsbee model: <\/p>\n<p><img decoding=\"async\" src=\"\/RSF\/book\/geo384w\/hw5\/sigsbee2\/Fig\/vel.png\" alt=\"\" title=\"\" \/> <img decoding=\"async\" src=\"\/RSF\/book\/geo384w\/hw5\/sigsbee2\/Fig\/refl.png\" alt=\"\" title=\"\" \/> <\/p>\n<p>The program has no parameters. <\/p>\n<h3 id=\"10previousprogramsofthemonth\">10 previous programs of the month<\/h3>\n<ul>\n<li><a href=\"\/blog\/2013\/07\/01\/program-of-the-month-sftime2depth\/\">sftime2depth<\/a><\/li>\n<li><a href=\"\/blog\/2013\/06\/12\/program-of-the-month-sfwiggle\/\">sfwiggle<\/a><\/li>\n<li><a href=\"\/blog\/2013\/05\/04\/program-of-the-month-sfvscan\/\">sfvscan<\/a><\/li>\n<li><a href=\"\/blog\/2013\/04\/08\/program-of-the-month-sfnmo\/\">sfnmo<\/a><\/li>\n<li><a href=\"\/blog\/2013\/03\/10\/program-of-the-month-sfpow\/\">sfpow<\/a><\/li>\n<li><a href=\"\/blog\/2013\/02\/09\/program-of-the-month-sfpwd\/\">sfpwd<\/a><\/li>\n<li><a href=\"\/blog\/2013\/01\/08\/program-of-the-month-sfricker1\/\">sfricker1<\/a><\/li>\n<li><a href=\"\/blog\/2012\/12\/23\/program-of-the-month-sfhalfint\/\">sfhalfint<\/a><\/li>\n<li><a href=\"\/blog\/2012\/11\/03\/program-of-the-month-sfbandpass\/\">sfbandpass<\/a><\/li>\n<li><a href=\"\/blog\/2012\/10\/03\/program-of-the-month-sfkirmod\/\">sfkirmod<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>sfai2refl converts acoustic impedance to normal-incidence PP reflectivity using the simple equation $$R(t) = \\frac{I(t+\\Delta t) &#8211; I(t)}{I(t+\\Delta t) + I(t)}$$ The program is useful for convolution modeling. The following example from rsf\/rsf\/wedge shows a classic example of wedge modeling, which is used for analyzing the tuning phenomenon (Kallweit, R. and L. Wood, 1982, The [&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":[3],"tags":[],"class_list":["post-344","post","type-post","status-publish","format-standard","hentry","category-programs"],"_links":{"self":[{"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/posts\/344","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=344"}],"version-history":[{"count":3,"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/posts\/344\/revisions"}],"predecessor-version":[{"id":15604,"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/posts\/344\/revisions\/15604"}],"wp:attachment":[{"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/media?parent=344"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/categories?post=344"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/tags?post=344"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}