6.4 Quality of positioning
The system determines its position accurately by using RTK correction, which is based on a
satellite navigation method. System applies positional corrections using a base station.
Table 4 lists things that have an influence on the quality and accuracy of the GNSS positioning.
The RTK positioning state is described in table 5.
Table 4. Positioning quality (accuracy)
Positioning quality
depends on
Description
Number of satellites
More satellites lead to better accuracy. RTK initialization demands
that at least 5 common satellites must be tracked at base and rover
sites. Once initialization has been gained, a minimum of 4
continuously tracked satellites must be maintained to produce an
RTK solution.
Satellite geometry (Fig 72) Satellite geometry describes the position of the satellites from the
view of the observer. Positioning is more accurate if satellites are
widely and evenly spaced throughout the sky.
Baseline
Increasing the distance between the machine and the base station
weakens positioning accuracy
Location of base station
Machine and base station must have access to the same satellites
Communication between
machine and base station
Weak radio link or network may cause latency in data transmission
Fig. 72 Satellite geometry.
Satellite geometry:
1. Good geometry
2. Poor geometry (accuracy is not best possible)
Table 5. State of RTK correction
RTK state Description
FIX
RTK correction is used. Accuracy is best possible
Float
One or more components of the RTK correction is insufficient. Accuracy is most of
the time better than one meter.
NOTE! Accuracy is insufficient to be used with LandNova.
SPS
The RTK correction is not available. Standard GPS accuracy is used instead
NOTE! Accuracy is insufficient to be used with LandNova.
User Manual. Xsite PRO SPI 14.2 Page 65 / 77
Summary of Contents for XSITE PRO SPI 14.2
Page 1: ...XSITE PRO SPI 14 2 USER MANUAL Version 1 14 2 46 October 2018...
Page 33: ...Fig 36 Tilt bucket calibration User Manual Xsite PRO SPI 14 2 Page 30 77...
Page 76: ...User Manual Xsite PRO SPI 14 2 Page 73 77...
Page 77: ...User Manual Xsite PRO SPI 14 2 Page 74 77...
