TABLE 1

Individual Error Components Considered for the Lunar UERE Formulation

LNSS segment	Error components (based on GPS UERE)	Lunar UERE (based on 1σ error)
Space/Control	Broadcast clock	σ_{clk, LNSS}
	Differential group delay	σ_{gd, LNSS}
	Broadcast ephemeris	σ_{eph, LNSS}
User	Ionospheric delay	-
	Tropospheric delay	-
	Receiver noise and resolution	σ_{rec, LNSS}
	Multipath effects	-

Note: This includes errors due to the broadcast clock, differential group delay, broadcast ephemeris, and receiver noise and resolution; other components, namely multipath effects, ionospheric delays, and tropospheric delays are considered to be negligible for the lunar environment.