Galileo OS SIS ICD.indd - GSA - Europa

7. Annex B - Defi nitions and Nomenclature
E5-Signal
E5a-Signal
E5b-Signal
E6-Signal
E1- Signal
Navigation Data
Stream
F/NAV Message
I/NAV Message
C/NAV Message
Data component
Pilot component
Receiver reference
bandwidth
The Galileo E5-signal consists of the signals E5a, E5b (and modulation
product signals) and is transmitted in the frequency band 1164 - 1215
MHz allocated to RNSS with a worldwide co-primary status. The E5-signal
shares the band with the co-primary Aeronautical Radionavigation Service
(ARNS) (ITU-R Radio Regulations). Moreover, it shares the band with
other RNSS-signals provided by EGNOS, GPS-L5, GLONASS etc. as
well as signals of the ARNS (DME, TACAN). Also found in the band is the
JTIDS-MIDS signal which is permitted on an NIB.
The Galileo E5a-signal is an inherent element of the E5-signal and
consists of a data-component transmitted in the in-phase component and
a pilot-component transmitted in the quadrature component. The E5asignal
provides the F/NAV message supporting Galileo Open Service and
overlaps (in the spectrum) with the GPS-L5-signal.
The Galileo E5b-signal is an inherent element of the E5-signal and
consists of a data-component transmitted in the in-phase component and
a pilot-component transmitted in the quadrature component. The E5bsignal
provides the I/NAV message and supports Safety of Life service,
Galileo system integrity and Open Service.
The Galileo E6-signal consists of the signal components E6-B and E6-C
and is transmitted in the frequency band 1215 - 300 MHz allocated on a
worldwide co-primary basis (ITU-R Radio Regulations), sharing with radar
systems of the radio navigation and radiolocation service. The signal
components E6-B and E6-C are data-component and pilot-component
respectively. The E6-signal provides the C-NAV message and supports
Commercial Service.
The Galileo E1-signal comprises the signal components E1-B and E1-C
and is transmitted in the frequency band 1559 - 1610 MHz allocated
to RNSS and ARNS on a worldwide co-primary basis (ITU-R Radio
Regulations).
The signal components E1-B and E1-C are data-component and pilotcomponent
respectively. The E1-signal provides the I/NAV message and
supports Safety of Life service, Galileo system integrity and Open Service.
Sequence of bits carrying the navigation data information by using a frame
structured transmission protocol.
Freely accessible navigation message provided by the E5a signal for
Open Service.
Integrity navigation message type provided by E5b and E1-B signals,
supporting Safety of Life Service and providing extended system integrity
information.
Commercial navigation message type provided by the E6-B signal
supporting Commercial Service.
A data component is the result of modulating ranging code, sub-carrier (if
present) and secondary code with a navigation data stream.
A pilot component (or dataless component) is made of ranging code,
sub-carrier (if present) and secondary code only, not modulated by a
navigation data stream.
The bandwidth of a hypothetical receiver with ideal (rectangular frequency
response) input fi lters
© European Union 2010
Document subject to terms of use and disclaimers p. ii-iii
OD SIS ICD, Issue 1, February 2010
57