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GBAS/SCAT-I Mode (Options R&S
EVSG-K4/-K5)
R&S
®
EVSG1000
122
User Manual 1178.6227.02 ─ 04
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Final Approach Segment (FAS) Construction Data
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Time Slot Synchronization via PPS
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7.1.1
GBAS Specifics
GBAS is a ground based augmentation system that can enhance satellite navigation.
The GBAS is intended to improve aircraft safety and to enhance satellite navigation
and the full range of precision approach and landing procedures, as well as the termi-
nal area operations.
GBAS components
The illustration in
is a simplified representation of the GBAS' three main
components:
●
the GNSS satellite subsystem
●
the airborne subsystem
●
the GBAS ground subsystem.
The ground equipment consists of four reference GNSS receivers at exactly defined
positions around the airport, GBAS ground station, and a VHF data broadcast transmit-
ter (VDB).
Figure 7-1: GBAS components and signals (simplified representation)
1 = GNSS reference receiver
2 = GBAS ground station
3 = VHF data broadcast (VDB) transmitter
a = GNSS navigation message
Basics on GBAS and SCAT-I Analysis