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E Comparison Of RT-2 And RT-20
MiLLennium GPSCard SW Version 4.503/4.52 Command Descriptions Manual Rev 2 235
Table E-6 RT-20 Performance
Figure E-5 Typical RT-20 Convergence - Static Mode
Tracking Time (sec)
Mode
1
Data Delay (sec) Distance (km) Accuracy (CEP)
1 - 180 Static 0 1 100 to 25 cm
180 - 3000 Static 0 1 25 to 5 cm
> 3000 Static 0 1
5 cm or less
2
1 - 600 Kinematic 0 1 100 to 25 cm
600 - 3000 Kinematic 0 1 25 to 5 cm
> 3000 Kinematic 0 1
5 cm or less
2
Either 0 - 2 1 +1 cm/sec
Either 2 - 7 1 +2 cm/sec
Either 7 - 30 1 +5 cm/sec
Either > 30 1
pseudorange or single point
3
Either 0 0 - 10 +0.5 cm/km
Either 0 10 - 20 +0.75 cm/km
Either 0 20 - 50 +1.0 cm/km
1 Mode = Static or Kinematic (during initial ambiguity resolution)
2 The accuracy specifications refer to the PRTKA/B logs which include about 3 cm extrapolation error. RTKA/B logs are
more accurate but have increased latency associated with them.
3 After 30 seconds reverts to pseudorange positioning (single point or differential depending on messages previously
received from the base station).
0
0.2
0.4
0.6
0.8
1
1.2
1.4
0 300 600 900 1200 1500 1800 2100 2400 2700 3000 3300
Seconds of Convergence
CEP(meters)
0.1 km 15 km 25 km 50 km
Baselines