Lars Thrane Iridium Certus 200, User & Installation Manual

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LT-4200 User & Installation Manual Rev. 1.00 Web server
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Figure 116: GNSS receiver horizontal position error
GNSS module
The GNSS receiver used in the LT-4230 Antenna Unit is a 72 ch. receiver with SBAS reception. The GNSS
receiver performance is listed in Table 25.
The GNSS receiver can be configured to the options listed in Table 26. The GPS, SBAS, GLONASS
configuration is the default configuration.
The horizontal position accuracy (static) has been measured for different configurations of the GNSS
receiver, see Figure 116.
IMPORTANT: The installation of the LT-4230 Antenna Unit will affect the performance of the GNSS
receiver. If line-of-sight to the GNSS satellites are disturbing the quality of the signal
received by the GNSS receiver, then degraded performance must be accepted.
GNSS receiver performance
Data Accuracy Resolution Comments
Position GNSS: < 2.5 m
SBAS: < 2 m
0.1 m CEP, 50%, 24 hours static, -130 dBm, > 6 SVs
By default, the GNSS receiver is configured for
GPS, SBAS, GLONASS reception
Time-To-First-Fix (cold acquisition): 26 s.
SOG 0.1 knot 0.1 knot 0 to 195 knots
Table 25: GNSS receiver performance
GNSS Receiver configuration
GNSS Receiver Talker ID
GPS, SBAS, GLONASS GN
GPS, SBAS, BeiDou GN
GPS, SBAS GP
GPS GP
GLONASS GL
BeiDou GB
Table 26: GNSS receiver configuration