Table of Contents
pulseEKKO PRO
iv
5.4.2 Fiducial Markers for GPS
...............................................................73
5.5
Data Collection Pause Menu
.....................................................................73
5.5.1 Exit
.................................................................................................73
5.5.2 Continue
.........................................................................................73
5.5.3 Scale
..............................................................................................73
5.5.4 Calib - Velocity Calibration
.............................................................75
5.5.4.1 Hyperbola Matching
..............................................................75
5.5.4.2 Identifying Air Reflections
......................................................77
5.5.4.3 Target of Known Depth
.........................................................78
5.6
Collect Grid Data
........................................................................................79
5.6.1 Select Line Direction
......................................................................79
5.6.2 Select Grid Line Number
...............................................................79
5.7
View Previously Collected Lines
................................................................80
5.8
Collect Data (No Save)
..............................................................................81
6
Surveying Techniques
.............................................................................82
6.1
Low Frequency Reflection (Profiling) Mode
..............................................82
6.1.1 Two Person Operation
...................................................................82
6.1.2 One Person Operation
...................................................................83
6.1.3 Strain Relief for Fibre Optic Cables
...............................................84
6.1.4 Maintaining Proper Antenna Separation
.......................................84
6.1.5 Antenna Movement
........................................................................85
6.2
High Frequency Reflection (Profiling) Mode
.............................................85
6.2.1 Tow Mode Operation
.....................................................................85
6.3
Antenna Orientation
...................................................................................86
6.4
Triggers
......................................................................................................87
6.5
Free Run
....................................................................................................87
6.6
Odometer Data Acquisition
........................................................................88
6.6.1 Skipping Traces
.............................................................................88
6.6.2 Backing up to Pinpoint Target Positions
........................................89
6.7
Signal Polarity
............................................................................................89
6.8
Spatially Aliasing the Data
.........................................................................89
6.9
Creating a Test Line for Data Quality
........................................................90
6.10
Adding GPS for Positioning
.......................................................................90
6.11
Common Mid-Point (CMP) Survey
............................................................91
6.12
Transillumination Surveys
..........................................................................93
