User's Manual

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100

Table Of Contents

1 General Overview
2 Noggin Components
3 Noggin 100 Assembly
4 SmartCart Assembly
- 4.1 Unfold the Handle
- 4.2 Attach Wheels
- 4.3 Attaching Separation Bars to the SmartCart
  - 4.3.1 Separation Bar Assembly
- 4.4 Attaching the Swivel Adapters (Noggin 250, 500 & 1000)
- 4.5 Attaching the Noggin to the SmartCart
- 4.6 Attach the Digital Video Logger (DVL)
- 4.7 Attach the Battery Unit
- 4.8 Adding GPS Mount to the SmartCart
5 SmartTow Assembly
- 5.1 Noggin 100
- 5.2 Noggin 250
- 5.3 Noggin 500 and 1000
6 SmartHandle Assembly (Noggin 500 & 1000 only)
- 6.1 SmartHandle “Pull” Configuration
- 6.2 Cable Connections
7 Rock Noggin Assembly (Noggin 500 & 1000 only)
8 Connecting GPS
9 Digital Video Logger (DVL)
- 9.1 Compact Flash Drive
- 9.2 DVL Temperatures
- 9.3 Running a DVL Detached from a Smart System
- 9.4 DVL Carrier
- 9.5 Connecting the DVL to the Smart System
10 Powering Up the System
11 Locate & Mark Mode
- 11.1 System Settings Screen
- 11.2 Scanning Screen
- 11.3 Locating Screen
- 11.4 Image Settings Screen
- 11.5 Changing the Date and Time
- 11.6 English and Equivalent Icons
12 Survey & Map Mode
- 12.1 Survey & Map Menu
- 12.2 Data Acquisition
- 12.3 Noggin Setup
- 12.4 Noggin File Management
- 12.5 Noggin Utilities
13 Troubleshooting
- 13.1 Power Supply
- 13.2 System Communications
- 13.3 System Overheating
- 13.4 DVL Problem
- 13.5 Noggin Problem
- 13.6 Creating a Test Line for Data Quality
- 13.7 Contacting Sensors & Software Inc.
14 Care and Maintenance
- 14.1 Battery Care
- 14.2 DVL Internal Battery
- 14.3 Cable Care
- 14.4 Skid Pads
- 14.5 Storage Cases
- 14.6 Spare Parts
Appendix A Noggin Data file Format
Appendix B Health & Safety Certification
Appendix C GPR Emissions, Interference and Regulations
- C-1 FCC Regulations (USA)
- C-2 ETSI Regulations for the EC (European Community)
- C-3 Industry Canada Regulations
Appendix D Instrument Interference
Appendix E Safety Around Explosive Devices
Appendix F Using the PXFER Cable and WinPXFER Software
- F1 Transferring Data to a PC using the PXFER Cable
- F1.1 Connecting the Digital Video Logger to a PC
- F1.2 PXFER Cable Types
- F1.3 Installing and Running the WinPXFER Program
- F1.4 Setting the DVL to the PXFER Cable Type
- F1.5 Transferring Noggin Data Buffer Files
- F1.6 Exporting Nogginplus Data
- F2 Transferring One or More Noggin PCX Files to an External PC using WinPXFER
Appendix G GPR Glossaries
- G-1 Basic GPR Terms
- G-2 Common GPR Terms
- G-3 Advanced GPR Terms

Noggin 12-Survey & Map Mode

12.2.11.2Identifying Air Reflections

Some hyperbolic reflections can also be caused by objects not in the subsurface such as fences,

overhead wires and, in some conditions, even large trees.

An important part of data interpretation is learning to recognize these unwanted “air” events and

differentiate them from the desired subsurface events. Good field notes are indispensable for

helping identify unwanted events on the data.

One way of identifying air reflections is to use the hyperbola fitting method. If the object is in air,

the radar velocity will be 0.3 m/ns or 0.984 ft/ns and will be much faster than if it is in the ground

(v ~ 0.1 m/ns or 0.328 ft/ns).

Figure: 12-5 Hyperbola matching can be used to identify reflections from objects that are not in the subsurface but

are from objects above ground. If the hyperbola matching velocity is near the speed of light (0.3 m/ns or 0.984 ft/ns)

then the hyperbola was caused by surface object like a overhead wire, tree, etc. After matching the hyperbola (right),

the “depth” value displayed on the bottom of the screen is really a measure of how far from the survey line the object is.