User's Manual

Geophysical Survey Systems, Inc. Model 5101 Antenna
www.geophysical.com System Settings and User Notes
Manual MN31-124 Rev - 3
Data Collection
Consult your control unit documentation for instructions on configuring your GPR system to
collect data with the Model 5101.
Collecting Data Using The Survey Wheel With The Standard Settings
System Run Mode: Survey Wheel (Distance)
Number of Scans per Meter: 200 (60 scans per foot) or higher
Remote Operation on the Survey Minicart
• Pressing the thumb rocker button button for less than one second will place a marker in the
data.
• Pressing the button for longer than 6 seconds will close any open files and turn off the
transmitter. To resume, the data acquisition sequence must be repeated.
Special Settings Used For Collecting Data On Bridge Decks
Setup Mode: Manual
System Run Mode: Survey Wheel
Range: 6 ns (unpaved), 10 ns (paved)
Number of Gain Points: 1
Vertical Low Pass Filter: 3000 MHz
Vertical High Pass Filter: 225 to 250 MHz
Vertical High Pass Filter (IIR): 10 MHz
No Horizontal Filters
Samples per Scan: 512
Bits per Sample: 16
Scans per Second: Set to the maximum scan rate allowed by the SIR System used
Signal Positioning: Use the same procedure as in standard setup
Set the Scans per Meter parameter to 80 scans per meter (24 scans per foot)
Calibrate the survey wheel before collecting data
Note: See Bridge Assessment Manual before proceeding.
Specifications
Center frequency: 1000 MHz
Pulse duration: 1 ns
Depth of penetration: 0-30 inches depending on type of concrete
Size of sensor: 1.5 x 4 x 6.5 inches (3.8 x 10 x 16.5 cm)