S3 User Guide 57 PN 875-0196-000 Rev C1
Chapter 5: Differential Correction Types
Using e-Dif
e-Dif uses only the standard GPS satellites and does not require an external correction
signal of any type.
e-Dif generates internal differential corrections based on the starting location. The
differential corrections are modeled over time and applied to the GPS data to maintain
a consistent relative position. This technique is stable and accurate within short time
frames, making it perfect for progressive pass-to-pass guidance. As long as each pass
is within a few minutes of the last pass, the accuracy performance is very good.
Selecting e-Dif
1. Touch the GPS tab.
2. Touch the Setup button.
3. In the Choose GPS Application area touch the e-Dif button (the e-Dif button
along the right of the screen is now active).
Initialization of the S3 on Powerup
After powerup the S3 must track GPS satellites for approximately 10 minutes before it
can generate differential corrections. The vehicle may be moving or stationary during
this time but the antenna should have a clear view of the sky.
While tracking, on the GPS Details screen the e-Dif Status field displays “Waiting” and
an estimate of how much longer it will take to start generating corrections. The GPS
Status field displays “Warming Up” during this period (see Figure 5-1).
Figure 5-1: e-Dif status information on GPS Details screen
When the S3 has finished tracking, the GPS Status field displays “Ready.”
To Next Page
Loading...
