11
GSM19 Series Magnetometers - Version 7
GEM Systems, Inc. Advanced Magnetometers
For more technical information, visit www.gemsys.ca
notation used by software programs, such as Encom, Geosoft and Intrepid. This was a key
upgrade in version 7 (i.e. to enable seamless data transfer from GEM output ASCII files to
destination programs).
29.
Select C-change and enter a value, say 10, for this parameter. The system displays the line
spacing item. You can use this control to define how far apart you would like your lines
defined.
30.
Press F-ok. The system displays a “please wait” message while it generates the grid. This
can take up to a minute to generate so please be patient! When finished, the system displays
the lane width screen. This is the first step in a process of verifying that the lines created are
consistent with the values you want.
31.
Press F-ok in the lane width screen. The system displays the waypoint review screen with
the first waypoint identifier (1). Press F-ok again. The system displays the second waypoint
identifier (2). Press F-ok again. The system displays the waypoint 0001 screen.
32.
Use the waypoint screen to confirm that the easting and northing values are the ones you
intended to use. At this point, you can either continue to check values or press E-end to exit
from this screen and return to the GPS screen. You are now ready to survey.
1.1.6 Starting a Reading, Surveying and Stopping Recording
In this section, we quickly review the steps involved in actually acquiring data in walking mode.
We start with the basic steps and then move to more advanced concepts such as positioning systems
and how to use the X-Y positioning system.
33.
From the Survey menu, press A-start. The system displays a “please wait” message while it
initializes the GPS. The system then displays the start survey screen. This screen has
controls for advancing the waypoint (currently you see distances to your second waypoint).
34.
We recommend that you use the A- control to decrement the waypoint from 2 to 1. You can
then use the navigation arrow and distance fields on the screen to navigate to waypoint 1
where you will start your survey.
35.
When you arrive at waypoint 1, use the B+ control to increment the waypoint to waypoint 2.
Then press F-start survey. The system synchronizes to UTC time.
Note: This can take up to fifteen minutes when you are first using the magnetometer in
a new part of the world.
Please be patient. If there is no action within this period, you can
try to re-initialize using the re-initialize function as described in the Working with GPS
Functionality section of this tutorial.
36.
On proper initialization, the system displays the stop / walk screen after you press F-start
survey. Select C-walk. The system displays the line / picket / display screen.