Webinar: Basics of Interpreting Ground Penetrating Radar Data - Part 1 скачать в хорошем качестве

Webinar: Basics of Interpreting Ground Penetrating Radar Data - Part 1

How to read GPR data? This webinar explores the basics of signals seen on GPR cross-sections. Understand responses from subsurface objects and boundaries. Learn that not everything you see in a GPR line is necessarily from the subsurface. Join us to understand how to avoid common pitfalls of GPR data interpretation. Part 2 available here -    • Webinar The Basics of Interpreting GPR Dat...   Contact Sensors & Software Inc. - https://www.sensoft.ca/contact-us-gpr/ GPR Interpretation Basics – Part 1 0:00 - Introduction 1:55 – What causes GPR Reflections? 4:25 – What controls the amount of GPR energy that reflects? 12:37 – GPR reflections from metallic and non-metallic utilities 16:17 – Geological reflections example 16:54 - Utility reflections example 18:50 – The shape of GPR signals 19:39 – Attenuation of GPR Signals 22:49 – Types of subsurface objects 24:20 – Hyperbolas in GPR images 27:00 – Tracking the path of a utility 28:32 – Crossing a utility at an angle 33:38 – Reflections from boundaries 34:20 – Direct air and ground arrivals at the top of all GPR images 37:24 – Direct arrivals change as surface conditions change 38:40 – Background radio frequency noise in GPR images 42:55 – Depth of GPR signal penetration 44:03 – GPR Interpretation Quiz 44:38 – Question 1 – Which target is likely non-metallic? 46:05 – Question 2 – What is the composition of the targets? 47:36 – Question 3 – Was this concrete data collected in the basement or on the second floor? 49:18 – Question 4 – What is the most plausible explanation of what happened to the pipe on Line 3? 51:22 – Question 5 – How do you interpret the vertical signals in the middle of this GPR line? 52:26 – Question 6 – Why is hyperbola 1 wider than hyperbola 2? 54:00 – Question 7 – Where is the gravel layer? 55:13 – Question 8 – What is happening in the concrete? 56:40 – Question 9 – Why are there no reflections here? 58:53 – Question 10 – What is causing the strong reflectors at about 1.6 meters? 1:00:15 – Summary 1:01:26 - Finish