GPR | Clipmarks


	GPR

bobzebeam

8-31-2009 5:52 AM

120 views

tags:

gpr, geophysics, archaeology, radar

bobzebeam says:

I can provide a GPR free of charge if for academic research

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/6359eef2-3b0b-48a9-8936-958781d99992/AF000D45-BCA9-4C9D-8949-0C5DCDD23281/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://heritage-key.com/world/archaeologists-guide-headache-free-gpr" href="http://heritage-key.com/world/archaeologists-guide-headache-free-gpr" style="font-size: 11px;">heritage-key.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://heritage-key.com/world/archaeologists-guide-headache-free-gpr"><H1 class="title">An Archaeologist's Guide to Headache-free GPR</H1></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://heritage-key.com/world/archaeologists-guide-headache-free-gpr"><P>Developed in the 1970’s, Ground Penetrating Radar (GPR) uses radio waves to detect and map underground objects and soil/rock strata. In the last three decades archaeologists have made extensive use of the technology. It allows them to detect, map and analyze archaeological remains without putting a shovel into the ground.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://heritage-key.com/world/archaeologists-guide-headache-free-gpr"><P><STRONG>How it works</STRONG></P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://heritage-key.com/world/archaeologists-guide-headache-free-gpr"><P>The science behind GPR is complex and has been the source of plenty of headaches for <A href="http://heritage-key.com/archaeology">archaeology</A> students. A very basic explanation of the technology works like this:</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://heritage-key.com/world/archaeologists-guide-headache-free-gpr"><P>The antenna of a GPR system shoots radio pulses into the ground. Each pulse travels through the ground as a wave.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://heritage-key.com/world/archaeologists-guide-headache-free-gpr"><P>Within the ground there are different layers of subsurface materials (soils, rocks and, hopefully, archaeological remains).</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://heritage-key.com/world/archaeologists-guide-headache-free-gpr"><P>Every time this wave comes in contact with a new layer of soil or debris, the velocity of the wave changes. This causes some of the energy of the wave to “bounce” back as a reflected wave.</P></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/AF000D45-BCA9-4C9D-8949-0C5DCDD23281/blog/" title="blog or email this clip"><img src="http://content6.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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