GSSI SIR 4000, Manual

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Geophysical Survey Systems, Inc. SIR® 4000
Manual
MN72-433 Rev F 12
GPS
Allows you to configure your
SIR 4000 to collect GPS data
during data collection. Make the
following selections to enable
GPS collection.
GPS Type:
None is set when GPS
is not connected. Custom should
be selected if a GPS is connected
and needs to be configured.
Baud Rate:
Match the baud rate
with the one you are using on
your GPS. Available baud rates
range from 4800 up to 230400.
Format:
Select which format to use when displaying point, Degrees Minutes Seconds, Degrees Minutes
Decimal Minutes, and Decimal Degrees.
Lat/Long:
Displays the currents position in whichever format is currently selected.
Fix Quality:
Shows whether or not a GPS or DGPS signal is recording.
Satellites:
Displays the number of satellites that are currently in view of the GPS. These satellites are
displayed on the plot in the middle of the GPS Configuration window.
HDOP:
The Horizontal Dilution of Precision is the relative accuracy of the horizontal position. The
system needs an HDOP of 2 or less in order to collect data.
Radius:
This indicates the size of the Circular Error Probability which appears in the center of the GPS
window as a bull’s eye. This is the radius of a circle, which centers on the mean of the GPS accuracy in
seconds.
Steps to setup the SIR 4000 to match GPS Settings:
1
Connect your GPS to the SIR 4000 through the Serial Port.
2
Turn on your GPS.
3
If planning to recall a default or custom setting, proceed to Last Used Setting or New Project. Select
the saved setup you plan to use and then return to the Introduction Screen.
4
Select the GPS control button.
5
Select Custom from GPS Type.
6
Select the Baud Rate that matches the one set on your GPS.
7
Press the green Start button on the right side of the SIR 4000.
8
Wait for the GPS to acquire enough satellites and accuracy so that the HDOP is 2 or less.
9
Select Apply to save the GPS configuration and exit the menu.