GSSI SIR 20, User Manual

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Geophysical Survey Systems, Inc. SIR® 20
Manual
MN92-078 Rev F 83
Appendix C: Listing of Antenna Parameters
The SIR 20 comes with preloaded setups to fit the system’s data collection parameters and filters to the
most commonly used, currently available GSSI antennas. Settings for additional antennae are also
provided below to assist you in creating a setup for an older or specialized antenna. Please note that these
are only generalized setups, and it may be necessary to alter these to your particular situation. For
example, deeper penetration can be set by increasing the range during setup.
Dipole Spacings in Common GSSI Antennas
Antenna (Model/Frequency) Dipole Spacing Dipole to Edge of Antenna Housing
5100B/1.6GHz 60 mm 30 mm
5100/1.5 GHz 60 mm 30 mm
5101/1GHz 100 mm 25 mm
3101/900 MHz 155 mm 75 mm
5103/400 MHz 160 mm 60 mm
5104/270 MHz 240 mm 100 mm
5106/200 MHz 335 mm 120 mm
** Note that all measurements are in Millimeters and are taken from the center of the dipole ‘bowtie.’