User's Manual Part 1

94 OEMV Family Installation and Operation User Manual Rev 5B
Chapter 5 Positioning Modes of Operation
Table 19: RT-2 Degradation With Respect To Data Delay
The RT-2 solution can show two pronounced steps in accuracy convergence; these correspond to the
single-point solution switching to the floating ambiguity solution which in turn switches to the narrow
lane solution. If you were monitoring this using NovAtel’s CDU program, the convergence might
look something like this:
Figure 30: AdVance RTK - Time to Integer Narrowlane vs. Baseline Length
Data Delay (s) Distance (km) Accuracy (RMS)
0 - 2 1 +1 cm/s
2 - 7 1 +2 cm/s
7 - 30 1 +5 cm/s
>60 1
single point or pseudorange differential positioning
2
1
Mode = Static or Kinematic
2
After 60 seconds reverts to pseudorange positioning (single point or differential depending on
messages previously received from the base station).
Time after 5 satellites are
tracking with good parity
conditionsand open sky