﻿ The Basics of Interpreting GPR Data – Part 2
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# The Basics of Interpreting GPR Data – Part 2

## Webinar: The Basics of Interpreting GPR Data – Part 2

This is the second webinar in our series on the Basics of Interpreting GPR Data. It is an extension of Part 1 and covers more advanced areas of GPR data interpretation.

If you have not seen Part 1, it is suggested that you watch it before attending Part 2. The recording of Part 1 can be found here: Basics of Interpreting GPR data Part – 1

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GPR Interpretation Basics – Part 2

• 0:00 – Introduction
• 0:16 – Review of Part 1
• 3:51 – Using Hyperbolas to calibrate for target depth
• 13:20 – Targets of Different Shapes
• 18:27 – Reflections from the bottom of a non-metallic pipe
• 19:45 – Determining the diameter of a non-metallic pipe
• 23:18 – “Ringy” responses
• 26:47 – Reflections within a non-metallic pipe
• 28:17 – Responses from Point Targets
• 30:30 – Responses from small, shallow metal objects
• 32:35 – Air waves
• 36:06 – How to measure the distance to an object in air
• 41:15 – Responses from large diameter objects
• 42:37 – Responses from Utilities in trenches
• 45:12 – Random Noise
• 46:14 – Coherent System Noise
• 51:30 – GPR Interpretation Quiz
• 51:40 – Question 1 – How many utilities?
• 52:35 – Question 2 – How many targets?
• 53:44 – Question 3 – Could the strong, flat reflector be the water table?
• 55:40 – Question 4 – How high is the ceiling of the warehouse?
• 56:33 – Question 5 – What could cause these types of reflections?
• 58:28 – Question 6 – Which object is not round?
• 58:55 – Question 7 – Did the GPR line end near a utility or is the hyperbola an air wave?
• 1:00:22 – Question 8 – Could this be a coffin buried 6 feet deep?
• 1:01:30 – Question 9 – Which hyperbola is best to calibrate on?
• 1:02:30 – Question 10 – Why is the reflection from the bottom of the concrete slab missing?
• 1:04:06 – Finish

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