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SPSx51 Modular GPS Receivers User Guide 103
Automatically Setting up a Mobile Base Station Using AutoBase Technology 8
station. Make sure that you use the same base station latitude, longitude, and height as in
the previous setup otherwise you will experience position or height errors in all subsequent
measurements.
Trimble recommends that after any new base station setup, or at the start of each
measurement session, you measure a known point to verify that position and height errors
are within tolerance. This is good practice and it takes just a few seconds to eliminate
potentially gross errors typically associated with repeated daily base station setups.
The AutoBase process
Figure 8.1 Autobase process flowchart
On
Display
AutoBase
Warning
No
Is
AutoBase
Warning
On or Off?
Create new
application
file
Save new
application
file with
“Auto” base
name
Make new
“Auto”
application
file active
Power On
Receiver
Receiver
looks for
application
files
Do
application
files exist?
Off
No
Ye s
Any
application
file that
corresponds
with the
current
position?
No
Ye s
Ye s
Make most
recently
created
application
active
Make
corresponding
application
file active
Is there more
than one
acceptable
application
file?
Auto Base
turned on
Auto Base
turned off
Status last
application
file used
before
power off.