1.0Subsurface Reflectionshttps://sensoft.ca/gprPeter Annanhttps://sensoft.ca/gpr/author/apa/rich600338<blockquote class="wp-embedded-content" data-secret="xT9gPlbYXG"><a href="https://sensoft.ca/gpr/the-water-myth/">The Water Myth</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://sensoft.ca/gpr/the-water-myth/embed/#?secret=xT9gPlbYXG" width="600" height="338" title="“The Water Myth” — Subsurface Reflections" data-secret="xT9gPlbYXG" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://sensoft.ca/gpr/wp-includes/js/wp-embed.min.js /* ]]> */ </script> https://sensoft.ca/gpr/wp-content/uploads/2018/11/FOT6263_SSoftw-copy-min.jpg22501502[et_pb_section bb_built=”1″ _builder_version=”3.17″ next_background_color=”#000000″][et_pb_row _builder_version=”3.17″][et_pb_column type=”4_4″][et_pb_text _builder_version=”3.17″ text_font=”Forza_Book||||||||”] For many years, the myth that GPR does not work when the ground is wet has persisted. In the earliest days of GPR, one of the first things discovered was that the radio wave propagation velocity in the ground was strongly controlled by the volumetric water content. […]