Innovative Radiating Systems for Train Localization in Interference Conditions

Table 6

UERE figure for GPS L1 receiver.

It.	Error source	Value (rms-m)
1	Satellite clock synchronization	0^1
2	Satellite perturbations	0^2
3	Ephemeris prediction error	0^1
4	Ionosphere delay	4.87^3
5	Troposphere delay	0.1^4
6	Multipath	0.2^5
7	Receiver noise and resolution thermal noise	0.20^6
8	UERE	4.87

1GNSS receiver augmented by SBAS satellites (e.g., QZSS for Australia) from direct signal in space (SIS).
²GNSS receiver augmented by SBAS satellites.
³Single frequency GNSS receiver, no corrections applied.
⁴Value obtained by “Ifadis” model [5].
⁵Assuming signal-to-multipath ratio: 27.5 dB, path delay: 26 m, E-L narrow spacing: 0.1 chip, signal bandwidth = 24 MHz.
⁶Assuming noncoherent discriminator DLL with early-late spacing: 0.1; C/No: 40 dB-Hz; code loop noise bandwidth: 0.1 Hz integration time: 20 msec; chip length of code: 293.2551 m.