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GSM19 Series Magnetometers - Version 7
GEM Systems, Inc. Advanced Magnetometers
For more technical information, visit www.gemsys.ca
•
B-navigation. This is the main access point for the
waypoint options
– Automatic,
Programmable and RS-232, as well as lane guidance for controlling the width of
acceptable deviation (i.e. wander) from the grid lines.
•
C-synch-to-UTC. Manual synchronization of GPS. Normally GPS is synchronized when
you start the survey; however, this functionality is intended for synchronization of non-
GPS magnetometers and gradiometers. The way you use this is to first synchronize the
rover (assuming this is the GPS unit) and then connect the rover to the base
magnetometer and synchronize the times using standard synchronization cables and
functionality.
•
D-test. This is a very useful display menu that shows you what the GPS system is seeing
when you have it turned on. Parameters include Lat / Long, UTM, number of satellites,
strength in decibels and other values.
20.
From the Survey menu, press F-GPS. The system displays the GPS screen.
21.
Press C-change to set the GPS to Yes. Press F-ok. The system displays the Navigation
menu. You can choose to initialize values, or more commonly, to set the Navigation options.
22.
Select B-navigation. The system displays the lane guidance and grid setup screen. You have
the option of changing the setting from no to yes as required. Generally, you want to have
lane guidance active, so use C-change to set the value to yes, and then press F-ok. The
system displays the grid setup screen.
23.
In this example, choose the A-automatic grid setup option. This creates a grid of 500
parallel lines (as defined by the starting and ending waypoints of the starting line). The
system displays the lane width screen.
24.
Use the C-change control to set the lane width (i.e. tolerance value for navigating along the
lines) to the appropriate value, say, 25m.
25.
Press F-ok. The system displays the start point screen. Enter the starting Easting and
Northing of the first waypoint (i.e. for the line you want to use as your starting line).
26.
After you enter your first two points, you will see local grid origin (x and y) values. You can
choose to set these to local values so that the eastings and northings map to a local grid you
are using. In this case, we will assume the default values (i.e. 0) and continue.
27.
After you enter the local grid (y) value, the system displays the end point screen. Similarly
to the starting point screen, complete all values as required and press F-ok. The system
displays the line screen.
28.
The line screen offers the opportunity to add a unique line number for each line of the
survey. This will be recorded in the output file along with a “/line” notation – a standard