GSSI GS Series Manuel utilisateur

MN27-151 Rev A

including the right of reproduction

in whole or in part in any form

Published by Geophysical Survey Systems, Inc.

40 Simon Street

Nashua, New Hampshire 03060-3075 USA

Printed in the United States

SIR, RADAN, UtilityScan and PaveScan RDM are registered trademarks

of Geophysical Survey Systems, Inc.

Geophysical Survey Systems, Inc. GS Series

200 HS Antenna

Limited Warranty, Limitations of Liability and

Restrictions

Geophysical Survey Systems, Inc. hereinafter referred to as GSSI, warrants that for a period of

24 months from the delivery date to the original purchaser this product will be free from defects in

materials and workmanship. EXCEPT FOR THE FOREGOING LIMITED WARRANTY, GSSI

DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING ANY WARRANTY OF

MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. GSSI's obligation is limited to

repairing or replacing parts or equipment which are returned to GSSI, transportation and insurance pre-

paid, without alteration or further damage, and which in GSSI's judgment, were defective or became

defective during normal use.

GSSI ASSUMES NO LIABILITY FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR

CONSEQUENTIAL DAMAGES OR INJURIES CAUSED BY PROPER OR IMPROPER OPERATION

OF ITS EQUIPMENT, WHETHER OR NOT DEFECTIVE.

Before returning any equipment to GSSI, a Return Material Authorization (RMA) number must be

obtained. Please call the GSSI Customer Service Manager who will assign an RMA number. Be sure to

have the serial number of the unit available

Regulatory Information

The use of GSSI antennas is governed by different regulatory agencies around the world. Specific antenna

models must be certified for legal operation in your country. Please read and understand the following

regulatory passages that pertain to your antenna. A listing of certified antennas by region can be found

www.geophysical.com/regulatoryinformation.htm.

Notice

Operation is subject to the following two conditions: (1) this device may not cause interference, and (2)

this device must accept any interference, including interference that may cause undesired operation of the

device.

Survey Wheels

All of GSSI’s antennas are designed to operate with survey wheels. Some antennas have built-in survey

wheels, including the 62000 Palm Antenna and the Mini-SIR. The series of concrete antennas, including

the 5100, 5101 and 52600, have survey wheels built in to their special carts, the 614 and 615. The larger

antennas, including the 3101D, 5103, 50400 and 5104 are used in the larger carts, the 623 and 643, which

have survey wheels built in to them. Various sizes of survey wheels can also be attached directly to these

antennas. This includes the 611, 620 and 622. For highway surveys we use the 630 Distance measuring

Instrument (DMI).

Geophysical Survey Systems, Inc. GS Series

200 HS Antenna

Geophysical Survey Systems, Inc. GS Series

200 HS Antenna

Table of Contents

Introduction.....................................................................................................................................1

What Comes in the Box.............................................................................................. 1

A Note about HyperStacking Technology........................................................... 1

About this Manual........................................................................................................ 1

Hardware Assembly.....................................................................................................................2

Setting Up Your System for the First Time ......................................................................3

Interface and Menus.................................................................................................... 4

Configuring One-Time and Global Settings ....................................................... 4

Connecting to the Antenna....................................................................................... 5

Overview of Menu Items and their Functions.................................................................6

The Global/Project Menu Stack............................................................................... 6

The File Parameters Menu Stack............................................................................. 9

Control Bar ....................................................................................................................13

Status Bar.......................................................................................................................14

Setting Up for Data Collection ............................................................................................ 15

Collecting Data............................................................................................................................ 18

Playing Back Data ...................................................................................................................... 19

File Maintenance and Data Transfer................................................................................. 20

Appendix A: GPS......................................................................................................................... 22

Appendix B: File Formats........................................................................................................ 23

Appendix C: Loading the App on a Windows Tablet PC ........................................ 24

Appendix D: System Specifications................................................................................... 25

Geophysical Survey Systems, Inc. GS Series

200 HS Antenna

Geophysical Survey Systems, Inc. GS Series

200 HS Antenna

MN27-151 Rev A 1

Introduction

Thank you for purchasing one of GSSI’s GS (Geophysical Survey) Series lower frequency antennas. The

GS antennas represent the state-of-the-art for GPR applications that require the deepest possible

penetration while maintaining the fine resolution you’ve come to expect from GSSI mid and high

frequency systems. GS antennas incorporate GSSI’s HyperStacking®(HS) technology for blazingly fast

collection speed and high levels of noise immunity. The GS has been designed with real-life field

conditions in mind. This is a system that you can confidently take to the ends of the Earth and use in the

harshest environments. Here at GSSI we’re very proud of what we’ve created and even prouder that

you’ve decided to place your trust in us.

What Comes in the Box

•200 HS Antenna

•HS Module

•Lithium-ion Batteries (2)

•Dual Bay Battery Charger

•Tow Handle

•GS Series Manual

•Panasonic G1 Tablet (optional)

•SIR 4000 WiFi Module (optional)

A Note about HyperStacking Technology

The GPR data you see on the screen start as received pulses of electromagnetic energy that have reflected

off objects or interfaces in the ground. The reflected signals generate electrical charges in the receive

antenna element that are digitized by the antenna’s onboard sampler. They are then converted into digital

values and displayed as a colorized linescan profile or an oscilloscope trace. Traditional GPR systems

send out one pulse at a time and record one small piece of reflected information (a sample) from that one

pulse. It takes many samples to make a single scan and many scans to make a profile.

HyperStacking (HS for short) technology represents a generational leap in GPR. HS antennas record

many samples from a single pulse. This allows an HS antenna to record data at speeds up to an order of

magnitude faster than conventional systems. In practice, the HS antennas use that extra data to average, or

stack, individual samples. This helps to reduce the random noise present in the signal and results in

cleaner and deeper data.

An added benefit is that we randomize the timing of the transmit pulse. This is called “dithering” and

means that we automatically average out manmade noise from nearby radio transmitters. This patented

technique enables you to work more confidently in high-noise environments like urban areas or airports.

About this Manual

This document provides important information for operating the GS Series antenna and collecting,

reviewing, and transferring GPR data to a PC. It is available for free download at

www.geophysical.com. This manual is not necessarily a substitute for a full training class. Purchase of a

GS Series system includes complimentary access to GSSI’s regularly scheduled curriculum of

professionally led training classes. We encourage you to take advantage of the opportunities for

instruction and networking with other professionals. Please visit www.geophysical.com or contact

training@geophysical.com for more details.

Geophysical Survey Systems, Inc. GS Series

200 HS Antenna

MN27-151 Rev A 2

Hardware Assembly

This section describes how to assemble your GS Series Antenna to prepare for a survey. Here we are

assuming a distance-based survey; if you are instead performing a time or point-based survey disregard

steps 3-5.

Unpack and prepare:

•200 HS

•Tow Handle

•HS Module

•1 Lithium-ion battery

•Model 620 SW (for distance-based only)

•A wrench (for distance-based only)

1Attach the HS Module to the top of your 200 HS

antenna. Snap the two levers (one on each side) to

secure it.

2Clip the Tow Handle to the front of the device. The front

is also where the battery port sits. There are four areas to

clip to – pick an orientation that works best for your site

to keep the antenna on the ground.

3Attach the Model 620 SW brackets to the back of the 200 HS. You will need a wrench to secure the

bolts properly.

Geophysical Survey Systems, Inc. GS Series

200 HS Antenna

MN27-151 Rev A 3

4Secure the 620SW to the brackets using the attached pins.

5Attach the 620SW cable to the 4-pin connection on the

HS Module

6Insert a battery into the battery port on the antenna.

7Press the power button on the HS Module.

8Wait for the power light to blink continuously before attempting

to connect on the Panasonic G1 Tablet or before powering on

your SIR 4000.

Setting Up Your System for the First Time

This section describes how to configure typical one-time settings such as language and units of

measurement, connect to the antenna via WiFi, and navigate the control software. For this section we are

assuming the use of a tablet computer. For use with the SIR-4000, please refer to the appropriate section

of the SIR-4000 manual.

1To begin, double tap the GS Series shortcut from the Windows desktop.

You will briefly see the application loading image before landing on the

Playback/Collect screen.

•The right side of the window will show a list of detected antennas which are

transmitting a WiFi signal.

•The left side of the window will show project folders.

•If this is the first time you are using the system, the only folder shown will be the factory default

one: COMMON.

Playback/Collect Navigating the Menu Items

Geophysical Survey Systems, Inc. GS Series

200 HS Antenna

MN27-151 Rev A 4

Interface and Menus

There are three groupings of control items that you will interact with: the Global Stack at the left,

the File Specific Stack at the right, and the Control Bar at the bottom.

•In order to maximize the visible data image, these are collapsed into the sides of the screen and

opened when needed.

•The Global Stack and the File Stack can be accessed by tapping the collapsed menu icon in the

top left and top right corners respectively.

•The Control Bar is always present although the available functions may vary depending on which

mode you are in. We’ll describe these in greater detail in the next section.

Interface with all menus open

Configuring One-Time and Global Settings

Typical one-time settings include language and units of measurement. Typical global settings include the

project folder where you will save individual profiles. These changes will need to be made before

connecting to the antenna.

If you have already clicked through to Collect or Playback, tap the Back arrow <in the lower left corner

to return to the Collect/Playback screen.

1Tap the Global/Project stack button at the top left. This will expand the portion of the

menu pertaining to settings which do not vary from file to file in a single project.

2Scroll to the Project section of the stack. You are looking for the Units and Language options.

3Tap the selected parameter to change. For example, if you wish to change the Units from imperial

to metric, tap the word Imperial. These settings will remain from session to session.

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