EGNOS Signal Structure - Revision history

Gema.Cueto: Updated reference ICD/SDD links

2026-04-19T21:39:55Z

Updated reference ICD/SDD links

← Older revision		Revision as of 21:39, 19 April 2026
Line 14:		Line 14:
	[[File:EGNOS_Coverage.png\|Source: EGNOS Service Notice #22 <ref name= SN 22">[https://egnos-user-support.essp-sas.eu/new_egnos_ops/sites/default/files/documents/service_notice_22_0.pdf EGNOS Service Notice #22] </ref> \|340px\|thumb\|right]]		[[File:EGNOS_Coverage.png\|Source: EGNOS Service Notice #22 <ref name= SN 22">[https://egnos-user-support.essp-sas.eu/new_egnos_ops/sites/default/files/documents/service_notice_22_0.pdf EGNOS Service Notice #22] </ref> \|340px\|thumb\|right]]

	The EGNOS Signal In Space format is compliant with the ICAO SARPs for SBAS<ref>SARPS Amendment 77, Annex 10 to the Convention on International Civil Aviation, Aeronautical Telecommunications: International Standards and Recommended Practices, Volume 1, Radio Navigation Aids, November 2002.</ref> as stated in the [[EGNOS Open Service \| EGNOS Open Service]] Definition Document and the [[EGNOS Safety of Life Service\|EGNOS Safety of Life]] Service Definition Document.<ref name=" EGNOS OS SDD">[~~http~~://~~www~~.~~essp~~-~~sas~~.eu/~~service_definition_documents~~ EGNOS Open Service Definition Document]</ref><ref name=" EGNOS SOL SDD">[~~http~~://~~www~~.~~essp~~-~~sas~~.eu/~~service_definition_documents~~ EGNOS Safety of Life Service Definition Document]</ref> The EGNOS SIS interface characteristics comprise carrier and modulation radio frequency, message structure, protocol and content of the EGNOS message (detailed in the [[EGNOS Messages \| EGNOS Message Format ]] definition).		The EGNOS Signal In Space format is compliant with the ICAO SARPs for SBAS<ref>SARPS Amendment 77, Annex 10 to the Convention on International Civil Aviation, Aeronautical Telecommunications: International Standards and Recommended Practices, Volume 1, Radio Navigation Aids, November 2002.</ref> as stated in the [[EGNOS Open Service \| EGNOS Open Service]] Definition Document and the [[EGNOS Safety of Life Service\|EGNOS Safety of Life]] Service Definition Document.<ref name=" EGNOS OS SDD">[https://egnos.gsc-europa.eu/sites/default/files/documents/egnos_os_sdd_in_force.pdf?v=1743425975 EGNOS Open Service Definition Document]</ref><ref name=" EGNOS SOL SDD">[https://egnos.gsc-europa.eu/sites/default/files/documents/egnos_sol_sdd_in_force.pdf?v=1726657048 EGNOS Safety of Life Service Definition Document]</ref> The EGNOS SIS interface characteristics comprise carrier and modulation radio frequency, message structure, protocol and content of the EGNOS message (detailed in the [[EGNOS Messages \| EGNOS Message Format ]] definition).

	EGNOS uses three GEO satellites at different longitude to broadcast its signals across the whole EGNOS service area. See details in the [[EGNOS Space Segment \| EGNOS Space Segment]] article. The figure shows the most updated EGNOS GEO satellites coverage with a 5 degrees masking angle.		EGNOS uses three GEO satellites at different longitude to broadcast its signals across the whole EGNOS service area. See details in the [[EGNOS Space Segment \| EGNOS Space Segment]] article. The figure shows the most updated EGNOS GEO satellites coverage with a 5 degrees masking angle.

Gema.Cueto: /* EGNOS SIS Interface Characteristics */

2020-03-18T13:58:20Z

EGNOS SIS Interface Characteristics

← Older revision		Revision as of 13:58, 18 March 2020
Line 20:		Line 20:
	Contrary to the case of core navigation space vehicles with active navigation payloads, the EGNOS GEO satellites carry transponders relaying the signal transmitted from the [[EGNOS Ground Segment\|ground segment]] uplink stations.<ref name=" EGNOS OS SDD"/>		Contrary to the case of core navigation space vehicles with active navigation payloads, the EGNOS GEO satellites carry transponders relaying the signal transmitted from the [[EGNOS Ground Segment\|ground segment]] uplink stations.<ref name=" EGNOS OS SDD"/>

	EGNOS V3 will provide dual-frequency signals on both bands L1 and L5. It will provide augmented operational SoL services over Europe that improve the accuracy and availability of user positioning services. Also it will provide crucial integrity messages to EGNOS users with alerts within a few seconds in case of system degradation, consolidating EGNOS’ position as one of the leading edge GNSS Systems in the future. Will also ensure a full continuity of service for the next decade and will be ~~the first operational SBAS implementingimplement~~ the dual frequency and multi constellation world standard, replacing EGNOS V2 which has been in operation since 2011. For this, a new generation of user terminals will be needed according with the new standards for Dual Frequency Multi Constellation (DFMC).<ref name="EGNOS V3">[https://www.gsa.europa.eu/newsroom/news/airbus-awarded-egnos-v3-contract EGNOS V3 contract awarded]</ref>		EGNOS V3 will ensure a full continuity of service for the next decade and will be implement the dual frequency and multi constellation world standard, replacing EGNOS V2 which has been in operation since 2011. For this, a new generation of user terminals will be needed according with the new standards for Dual Frequency Multi Constellation (DFMC).<ref name="EGNOS V3">[https://www.gsa.europa.eu/newsroom/news/airbus-awarded-egnos-v3-contract EGNOS V3 contract awarded]</ref>

	==EGNOS SIS RF Characteristics==		==EGNOS SIS RF Characteristics==

Gema.Cueto: /* EGNOS SIS Interface Characteristics */

2020-03-18T13:54:58Z

EGNOS SIS Interface Characteristics

← Older revision		Revision as of 13:54, 18 March 2020
Line 16:		Line 16:
	The EGNOS Signal In Space format is compliant with the ICAO SARPs for SBAS<ref>SARPS Amendment 77, Annex 10 to the Convention on International Civil Aviation, Aeronautical Telecommunications: International Standards and Recommended Practices, Volume 1, Radio Navigation Aids, November 2002.</ref> as stated in the [[EGNOS Open Service \| EGNOS Open Service]] Definition Document and the [[EGNOS Safety of Life Service\|EGNOS Safety of Life]] Service Definition Document.<ref name=" EGNOS OS SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Open Service Definition Document]</ref><ref name=" EGNOS SOL SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Safety of Life Service Definition Document]</ref> The EGNOS SIS interface characteristics comprise carrier and modulation radio frequency, message structure, protocol and content of the EGNOS message (detailed in the [[EGNOS Messages \| EGNOS Message Format ]] definition).		The EGNOS Signal In Space format is compliant with the ICAO SARPs for SBAS<ref>SARPS Amendment 77, Annex 10 to the Convention on International Civil Aviation, Aeronautical Telecommunications: International Standards and Recommended Practices, Volume 1, Radio Navigation Aids, November 2002.</ref> as stated in the [[EGNOS Open Service \| EGNOS Open Service]] Definition Document and the [[EGNOS Safety of Life Service\|EGNOS Safety of Life]] Service Definition Document.<ref name=" EGNOS OS SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Open Service Definition Document]</ref><ref name=" EGNOS SOL SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Safety of Life Service Definition Document]</ref> The EGNOS SIS interface characteristics comprise carrier and modulation radio frequency, message structure, protocol and content of the EGNOS message (detailed in the [[EGNOS Messages \| EGNOS Message Format ]] definition).

	EGNOS uses three GEO satellites at different longitude to broadcast its signals across the whole EGNOS service ~~areaSee~~ details in the [[EGNOS Space Segment \| EGNOS Space Segment]] article. The figure shows the most updated EGNOS GEO satellites coverage with a 5 degrees masking angle.		EGNOS uses three GEO satellites at different longitude to broadcast its signals across the whole EGNOS service area. See details in the [[EGNOS Space Segment \| EGNOS Space Segment]] article. The figure shows the most updated EGNOS GEO satellites coverage with a 5 degrees masking angle.

	Contrary to the case of core navigation space vehicles with active navigation payloads, the EGNOS GEO satellites carry transponders relaying the signal transmitted from the [[EGNOS Ground Segment\|ground segment]] uplink stations.<ref name=" EGNOS OS SDD"/>		Contrary to the case of core navigation space vehicles with active navigation payloads, the EGNOS GEO satellites carry transponders relaying the signal transmitted from the [[EGNOS Ground Segment\|ground segment]] uplink stations.<ref name=" EGNOS OS SDD"/>

Gema.Cueto at 11:00, 18 March 2020

2020-03-18T11:00:14Z

← Older revision		Revision as of 11:00, 18 March 2020
Line 25:		Line 25:
	As any other SBAS, EGNOS broadcasts its augmentation information in L1 band, at 1575.42 MHz, using right-hand circular polarization (RHCP). Each individual second, EGNOS transmit a navigation message containing 250 bits of information.		As any other SBAS, EGNOS broadcasts its augmentation information in L1 band, at 1575.42 MHz, using right-hand circular polarization (RHCP). Each individual second, EGNOS transmit a navigation message containing 250 bits of information.
	This raw navigation message is ½ convolutional encoded with Forward Error Correcting (FEC) Code resulting in a 500 symbol/second EGNOS data stream.		This raw navigation message is ½ convolutional encoded with Forward Error Correcting (FEC) Code resulting in a 500 symbol/second EGNOS data stream.
	This data stream is added modulo-2 to a 1023-bit PRN code, which will then be biphase shift-keyed (BPSK) modulated onto the L1 carrier frequency at a rate of 1.023 Mega-chips/second (Mcps). <ref name=" RTCA MOPS DO 229">Minimum Operational Performance Standards for Global Positioning System/Wide Area Augmentation System ~~Airbone~~ Equipment</ref>		This data stream is added modulo-2 to a 1023-bit PRN code, which will then be biphase shift-keyed (BPSK) modulated onto the L1 carrier frequency at a rate of 1.023 Mega-chips/second (Mcps). <ref name=" RTCA MOPS DO 229">Minimum Operational Performance Standards for Global Positioning System/Wide Area Augmentation System Airborne Equipment (RTCA MOPS 229)</ref>

	For unobstructed view-lines with elevation angles greater than 5 degrees on the Earth surface, the EGNOS signal is received by 3dBi linearly polarised antennae with a power in the –161 dBW to –153 dBW range, assuming an orientation of the antenna orthogonal to the propagation direction. In addition, spurious transmissions are bounded at least 40dB below unmodulated carrier power.<ref name=" EGNOS OS SDD"/> It is planned to enhance the signal-to-noise ratio in future replenishments of the EGNOS space segment, with the intention to improve the tracking performance at user level.		For unobstructed view-lines with elevation angles greater than 5 degrees on the Earth surface, the EGNOS signal is received by 3dBi linearly polarised antennae with a power in the –161 dBW to –153 dBW range, assuming an orientation of the antenna orthogonal to the propagation direction. In addition, spurious transmissions are bounded at least 40dB below unmodulated carrier power.<ref name=" EGNOS OS SDD"/> It is planned to enhance the signal-to-noise ratio in future replenishments of the EGNOS space segment, with the intention to improve the tracking performance at user level.

Gema.Cueto: /* EGNOS SIS RF Characteristics */

2020-03-18T10:59:36Z

EGNOS SIS RF Characteristics

← Older revision		Revision as of 10:59, 18 March 2020
Line 31:		Line 31:
	As stated in MOPS DO 229, the most relevant EGNOS signal characteristics are detailed hereafter:<ref name=" RTCA MOPS DO 229"/>		As stated in MOPS DO 229, the most relevant EGNOS signal characteristics are detailed hereafter:<ref name=" RTCA MOPS DO 229"/>
	* '''Carrier Phase Noise''': The phase noise spectral density of the unmodulated carrier is such that a phase locked loop of 10Hz one-sided noise bandwidth is able to track the carrier to an accuracy of 0.1 radians rms.		* '''Carrier Phase Noise''': The phase noise spectral density of the unmodulated carrier is such that a phase locked loop of 10Hz one-sided noise bandwidth is able to track the carrier to an accuracy of 0.1 radians rms.
	* '''Signal Spectrum''': The broadcast signal is at GPS L1 frequency of 1575.42 MHz. At least 95% of the broadcast power is contained within a +/- 12MHz band ~~centered~~ at the L1 frequency. The bandwidth of the signal transmitted by an EGNOS satellite is at least 2.2MHz.		* '''Signal Spectrum''': The broadcast signal is at GPS L1 frequency of 1575.42 MHz. At least 95% of the broadcast power is contained within a +/- 12MHz band centred at the L1 frequency. The bandwidth of the signal transmitted by an EGNOS satellite is at least 2.2MHz.
	* '''Doppler Shift''': The Doppler shift, as perceived by a stationary user, on the signal broadcast by EGNOS GEOs is less than 40 meters per second (≈210 Hz at L1) in the worst case (at the end of life of the GEOs). The Doppler shift is due to the relative motion of the GEO.		* '''Doppler Shift''': The Doppler shift, as perceived by a stationary user, on the signal broadcast by EGNOS GEOs is less than 40 meters per second (≈210 Hz at L1) in the worst case (at the end of life of the GEOs). The Doppler shift is due to the relative motion of the GEO.
	* '''Carrier Frequency Stability''': The short term stability of the carrier frequency (square root of the Allan Variance) at the input of the user´s receiver antenna will be better than 5x10-11 over 1 to 10 seconds, excluding the effects of the ionosphere and Doppler.		* '''Carrier Frequency Stability''': The short term stability of the carrier frequency (square root of the Allan Variance) at the input of the user´s receiver antenna will be better than 5x10-11 over 1 to 10 seconds, excluding the effects of the ionosphere and Doppler.

Gema.Cueto at 10:58, 18 March 2020

2020-03-18T10:58:44Z

← Older revision		Revision as of 10:58, 18 March 2020
Line 20:		Line 20:
	Contrary to the case of core navigation space vehicles with active navigation payloads, the EGNOS GEO satellites carry transponders relaying the signal transmitted from the [[EGNOS Ground Segment\|ground segment]] uplink stations.<ref name=" EGNOS OS SDD"/>		Contrary to the case of core navigation space vehicles with active navigation payloads, the EGNOS GEO satellites carry transponders relaying the signal transmitted from the [[EGNOS Ground Segment\|ground segment]] uplink stations.<ref name=" EGNOS OS SDD"/>

	EGNOS V3 will provide dual-frequency signals on both bands L1 and L5. It will provide augmented operational SoL services over Europe that improve the accuracy and availability of user positioning services. Also it will provide crucial integrity messages to EGNOS users with alerts within a few seconds in case of system degradation, consolidating EGNOS’ position as one of the leading edge GNSS Systems in the future. Will also ensure a full continuity of service for the next decade and will be the first operational SBAS implementingimplement the dual frequency and multi constellation world standard, replacing EGNOS V2 which has been in operation since 2011. For this, a new generation of user terminals will be needed according with the new standards for Dual Frequency Multi Constellation (DFMC).		EGNOS V3 will provide dual-frequency signals on both bands L1 and L5. It will provide augmented operational SoL services over Europe that improve the accuracy and availability of user positioning services. Also it will provide crucial integrity messages to EGNOS users with alerts within a few seconds in case of system degradation, consolidating EGNOS’ position as one of the leading edge GNSS Systems in the future. Will also ensure a full continuity of service for the next decade and will be the first operational SBAS implementingimplement the dual frequency and multi constellation world standard, replacing EGNOS V2 which has been in operation since 2011. For this, a new generation of user terminals will be needed according with the new standards for Dual Frequency Multi Constellation (DFMC).<ref name="EGNOS V3">[https://www.gsa.europa.eu/newsroom/news/airbus-awarded-egnos-v3-contract EGNOS V3 contract awarded]</ref>

	==EGNOS SIS RF Characteristics==		==EGNOS SIS RF Characteristics==

Gema.Cueto: /* EGNOS SIS Interface Characteristics */

2020-03-18T10:57:36Z

EGNOS SIS Interface Characteristics

← Older revision		Revision as of 10:57, 18 March 2020
Line 20:		Line 20:
	Contrary to the case of core navigation space vehicles with active navigation payloads, the EGNOS GEO satellites carry transponders relaying the signal transmitted from the [[EGNOS Ground Segment\|ground segment]] uplink stations.<ref name=" EGNOS OS SDD"/>		Contrary to the case of core navigation space vehicles with active navigation payloads, the EGNOS GEO satellites carry transponders relaying the signal transmitted from the [[EGNOS Ground Segment\|ground segment]] uplink stations.<ref name=" EGNOS OS SDD"/>

	EGNOS V3 will provide dual-frequency signals on both bands L1 and L5. It will provide augmented operational SoL services over Europe that improve the accuracy and availability of user positioning services. Also it will provide crucial integrity messages to EGNOS users with alerts within a few seconds in case of system degradation, consolidating EGNOS’ position as one of the leading edge GNSS Systems in the future. Will also ensure a full continuity of service for the next decade and will be the first operational SBAS ~~implementing~~ the dual frequency and multi constellation world standard, replacing EGNOS V2 which has been in operation since 2011. For this a new generation of user ~~terminal~~ will be needed according with the new standards for Dual Frequency Multi Constellation (DFMC). <ref name=" EGNOS Exploitation Grant Plan 2017 ">[https://www.gsa.europa.eu/sites/default/files/egnos_annual_2017_grants_plan_0.pdf EGNOS Exploitation Grant Plan 2017 ]</ref><ref name=" AIRBUS-EGNOS V3 RIMS+NLES Performance Enginee ">[http://www.ifp.uni-stuttgart.de/uploads/jobs/171129_RIMS_NLESEngineer_FreeText.pdf EGNOS V3 RIMS and NLES ]</ref>		EGNOS V3 will provide dual-frequency signals on both bands L1 and L5. It will provide augmented operational SoL services over Europe that improve the accuracy and availability of user positioning services. Also it will provide crucial integrity messages to EGNOS users with alerts within a few seconds in case of system degradation, consolidating EGNOS’ position as one of the leading edge GNSS Systems in the future. Will also ensure a full continuity of service for the next decade and will be the first operational SBAS implementingimplement the dual frequency and multi constellation world standard, replacing EGNOS V2 which has been in operation since 2011. For this, a new generation of user terminals will be needed according with the new standards for Dual Frequency Multi Constellation (DFMC).

	==EGNOS SIS RF Characteristics==		==EGNOS SIS RF Characteristics==

Gema.Cueto: /* EGNOS SIS Interface Characteristics */

2020-03-18T10:56:05Z

EGNOS SIS Interface Characteristics

← Older revision		Revision as of 10:56, 18 March 2020
Line 16:		Line 16:
	The EGNOS Signal In Space format is compliant with the ICAO SARPs for SBAS<ref>SARPS Amendment 77, Annex 10 to the Convention on International Civil Aviation, Aeronautical Telecommunications: International Standards and Recommended Practices, Volume 1, Radio Navigation Aids, November 2002.</ref> as stated in the [[EGNOS Open Service \| EGNOS Open Service]] Definition Document and the [[EGNOS Safety of Life Service\|EGNOS Safety of Life]] Service Definition Document.<ref name=" EGNOS OS SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Open Service Definition Document]</ref><ref name=" EGNOS SOL SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Safety of Life Service Definition Document]</ref> The EGNOS SIS interface characteristics comprise carrier and modulation radio frequency, message structure, protocol and content of the EGNOS message (detailed in the [[EGNOS Messages \| EGNOS Message Format ]] definition).		The EGNOS Signal In Space format is compliant with the ICAO SARPs for SBAS<ref>SARPS Amendment 77, Annex 10 to the Convention on International Civil Aviation, Aeronautical Telecommunications: International Standards and Recommended Practices, Volume 1, Radio Navigation Aids, November 2002.</ref> as stated in the [[EGNOS Open Service \| EGNOS Open Service]] Definition Document and the [[EGNOS Safety of Life Service\|EGNOS Safety of Life]] Service Definition Document.<ref name=" EGNOS OS SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Open Service Definition Document]</ref><ref name=" EGNOS SOL SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Safety of Life Service Definition Document]</ref> The EGNOS SIS interface characteristics comprise carrier and modulation radio frequency, message structure, protocol and content of the EGNOS message (detailed in the [[EGNOS Messages \| EGNOS Message Format ]] definition).

	EGNOS uses three GEO satellites at different longitude to broadcast its signals across the whole EGNOS service areaSee details in the [EGNOS Space Segment\|EGNOS Space Segment] article. The figure shows the most updated EGNOS GEO satellites coverage with a 5 degrees masking angle.		EGNOS uses three GEO satellites at different longitude to broadcast its signals across the whole EGNOS service areaSee details in the [[EGNOS Space Segment \| EGNOS Space Segment]] article. The figure shows the most updated EGNOS GEO satellites coverage with a 5 degrees masking angle.

	Contrary to the case of core navigation space vehicles with active navigation payloads, the EGNOS GEO satellites carry transponders relaying the signal transmitted from the [[EGNOS Ground Segment\|ground segment]] uplink stations.<ref name=" EGNOS OS SDD"/>		Contrary to the case of core navigation space vehicles with active navigation payloads, the EGNOS GEO satellites carry transponders relaying the signal transmitted from the [[EGNOS Ground Segment\|ground segment]] uplink stations.<ref name=" EGNOS OS SDD"/>

Gema.Cueto: /* EGNOS SIS Interface Characteristics */

2020-03-18T10:55:18Z

EGNOS SIS Interface Characteristics

← Older revision		Revision as of 10:55, 18 March 2020
Line 16:		Line 16:
	The EGNOS Signal In Space format is compliant with the ICAO SARPs for SBAS<ref>SARPS Amendment 77, Annex 10 to the Convention on International Civil Aviation, Aeronautical Telecommunications: International Standards and Recommended Practices, Volume 1, Radio Navigation Aids, November 2002.</ref> as stated in the [[EGNOS Open Service \| EGNOS Open Service]] Definition Document and the [[EGNOS Safety of Life Service\|EGNOS Safety of Life]] Service Definition Document.<ref name=" EGNOS OS SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Open Service Definition Document]</ref><ref name=" EGNOS SOL SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Safety of Life Service Definition Document]</ref> The EGNOS SIS interface characteristics comprise carrier and modulation radio frequency, message structure, protocol and content of the EGNOS message (detailed in the [[EGNOS Messages \| EGNOS Message Format ]] definition).		The EGNOS Signal In Space format is compliant with the ICAO SARPs for SBAS<ref>SARPS Amendment 77, Annex 10 to the Convention on International Civil Aviation, Aeronautical Telecommunications: International Standards and Recommended Practices, Volume 1, Radio Navigation Aids, November 2002.</ref> as stated in the [[EGNOS Open Service \| EGNOS Open Service]] Definition Document and the [[EGNOS Safety of Life Service\|EGNOS Safety of Life]] Service Definition Document.<ref name=" EGNOS OS SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Open Service Definition Document]</ref><ref name=" EGNOS SOL SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Safety of Life Service Definition Document]</ref> The EGNOS SIS interface characteristics comprise carrier and modulation radio frequency, message structure, protocol and content of the EGNOS message (detailed in the [[EGNOS Messages \| EGNOS Message Format ]] definition).

	EGNOS uses three GEO satellites at different longitude to broadcast its signals across the whole EGNOS service ~~area, namely two Inmarsat-3 satellites, one positioned over~~ the ~~Atlantic and the other over Africa, and the ESA's Artemis satellite, located over Africa as well<ref name="~~ EGNOS ~~User Guide for Developers">[https://ec.europa.eu/commission/index_en~~ EGNOS ~~User Guide for Developers~~]~~</ref>;~~ the ~~footprint of the 3 Geostationary~~ satellites ~~can be observed in the illustration~~.		EGNOS uses three GEO satellites at different longitude to broadcast its signals across the whole EGNOS service areaSee details in the [EGNOS Space Segment\|EGNOS Space Segment] article. The figure shows the most updated EGNOS GEO satellites coverage with a 5 degrees masking angle.

	Contrary to the case of core navigation space vehicles with active navigation payloads, the EGNOS GEO satellites carry transponders relaying the signal transmitted from the [[EGNOS Ground Segment\|ground segment]] uplink stations.<ref name=" EGNOS OS SDD"/>		Contrary to the case of core navigation space vehicles with active navigation payloads, the EGNOS GEO satellites carry transponders relaying the signal transmitted from the [[EGNOS Ground Segment\|ground segment]] uplink stations.<ref name=" EGNOS OS SDD"/>

Gema.Cueto: /* EGNOS SIS Interface Characteristics */

2020-03-18T10:46:47Z

EGNOS SIS Interface Characteristics

← Older revision		Revision as of 10:46, 18 March 2020
Line 12:		Line 12:

	==EGNOS SIS Interface Characteristics==		==EGNOS SIS Interface Characteristics==
	[[File:EGNOS_Coverage.png\|Source: EGNOS Service Notice #22 <ref name= SN 22">[https://egnos-user-support.essp-sas.eu/new_egnos_ops/sites/default/files/documents/service_notice_22_0.pdf EGNOS Service Notice #22] </ref> ~~Coverage of EGNOS of GEOs with 5 degrees masking angle~~ \|340px\|thumb\|right]]		[[File:EGNOS_Coverage.png\|Source: EGNOS Service Notice #22 <ref name= SN 22">[https://egnos-user-support.essp-sas.eu/new_egnos_ops/sites/default/files/documents/service_notice_22_0.pdf EGNOS Service Notice #22] </ref> \|340px\|thumb\|right]]

	The EGNOS Signal In Space format is compliant with the ICAO SARPs for SBAS<ref>SARPS Amendment 77, Annex 10 to the Convention on International Civil Aviation, Aeronautical Telecommunications: International Standards and Recommended Practices, Volume 1, Radio Navigation Aids, November 2002.</ref> as stated in the [[EGNOS Open Service \| EGNOS Open Service]] Definition Document and the [[EGNOS Safety of Life Service\|EGNOS Safety of Life]] Service Definition Document.<ref name=" EGNOS OS SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Open Service Definition Document]</ref><ref name=" EGNOS SOL SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Safety of Life Service Definition Document]</ref> The EGNOS SIS interface characteristics comprise carrier and modulation radio frequency, message structure, protocol and content of the EGNOS message (detailed in the [[EGNOS Messages \| EGNOS Message Format ]] definition).		The EGNOS Signal In Space format is compliant with the ICAO SARPs for SBAS<ref>SARPS Amendment 77, Annex 10 to the Convention on International Civil Aviation, Aeronautical Telecommunications: International Standards and Recommended Practices, Volume 1, Radio Navigation Aids, November 2002.</ref> as stated in the [[EGNOS Open Service \| EGNOS Open Service]] Definition Document and the [[EGNOS Safety of Life Service\|EGNOS Safety of Life]] Service Definition Document.<ref name=" EGNOS OS SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Open Service Definition Document]</ref><ref name=" EGNOS SOL SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Safety of Life Service Definition Document]</ref> The EGNOS SIS interface characteristics comprise carrier and modulation radio frequency, message structure, protocol and content of the EGNOS message (detailed in the [[EGNOS Messages \| EGNOS Message Format ]] definition).

← Older revision		Revision as of 21:39, 19 April 2026
Line 14:		Line 14:
	[[File:EGNOS_Coverage.png\|Source: EGNOS Service Notice #22 <ref name= SN 22">[https://egnos-user-support.essp-sas.eu/new_egnos_ops/sites/default/files/documents/service_notice_22_0.pdf EGNOS Service Notice #22] </ref> \|340px\|thumb\|right]]		[[File:EGNOS_Coverage.png\|Source: EGNOS Service Notice #22 <ref name= SN 22">[https://egnos-user-support.essp-sas.eu/new_egnos_ops/sites/default/files/documents/service_notice_22_0.pdf EGNOS Service Notice #22] </ref> \|340px\|thumb\|right]]

	The EGNOS Signal In Space format is compliant with the ICAO SARPs for SBAS<ref>SARPS Amendment 77, Annex 10 to the Convention on International Civil Aviation, Aeronautical Telecommunications: International Standards and Recommended Practices, Volume 1, Radio Navigation Aids, November 2002.</ref> as stated in the [[EGNOS Open Service \| EGNOS Open Service]] Definition Document and the [[EGNOS Safety of Life Service\|EGNOS Safety of Life]] Service Definition Document.<ref name=" EGNOS OS SDD">[~~http~~://~~www~~.~~essp~~-~~sas~~.eu/~~service_definition_documents~~ EGNOS Open Service Definition Document]</ref><ref name=" EGNOS SOL SDD">[~~http~~://~~www~~.~~essp~~-~~sas~~.eu/~~service_definition_documents~~ EGNOS Safety of Life Service Definition Document]</ref> The EGNOS SIS interface characteristics comprise carrier and modulation radio frequency, message structure, protocol and content of the EGNOS message (detailed in the [[EGNOS Messages \| EGNOS Message Format ]] definition).		The EGNOS Signal In Space format is compliant with the ICAO SARPs for SBAS<ref>SARPS Amendment 77, Annex 10 to the Convention on International Civil Aviation, Aeronautical Telecommunications: International Standards and Recommended Practices, Volume 1, Radio Navigation Aids, November 2002.</ref> as stated in the [[EGNOS Open Service \| EGNOS Open Service]] Definition Document and the [[EGNOS Safety of Life Service\|EGNOS Safety of Life]] Service Definition Document.<ref name=" EGNOS OS SDD">[https://egnos.gsc-europa.eu/sites/default/files/documents/egnos_os_sdd_in_force.pdf?v=1743425975 EGNOS Open Service Definition Document]</ref><ref name=" EGNOS SOL SDD">[https://egnos.gsc-europa.eu/sites/default/files/documents/egnos_sol_sdd_in_force.pdf?v=1726657048 EGNOS Safety of Life Service Definition Document]</ref> The EGNOS SIS interface characteristics comprise carrier and modulation radio frequency, message structure, protocol and content of the EGNOS message (detailed in the [[EGNOS Messages \| EGNOS Message Format ]] definition).

	EGNOS uses three GEO satellites at different longitude to broadcast its signals across the whole EGNOS service area. See details in the [[EGNOS Space Segment \| EGNOS Space Segment]] article. The figure shows the most updated EGNOS GEO satellites coverage with a 5 degrees masking angle.		EGNOS uses three GEO satellites at different longitude to broadcast its signals across the whole EGNOS service area. See details in the [[EGNOS Space Segment \| EGNOS Space Segment]] article. The figure shows the most updated EGNOS GEO satellites coverage with a 5 degrees masking angle.

← Older revision		Revision as of 13:54, 18 March 2020
Line 16:		Line 16:
	The EGNOS Signal In Space format is compliant with the ICAO SARPs for SBAS<ref>SARPS Amendment 77, Annex 10 to the Convention on International Civil Aviation, Aeronautical Telecommunications: International Standards and Recommended Practices, Volume 1, Radio Navigation Aids, November 2002.</ref> as stated in the [[EGNOS Open Service \| EGNOS Open Service]] Definition Document and the [[EGNOS Safety of Life Service\|EGNOS Safety of Life]] Service Definition Document.<ref name=" EGNOS OS SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Open Service Definition Document]</ref><ref name=" EGNOS SOL SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Safety of Life Service Definition Document]</ref> The EGNOS SIS interface characteristics comprise carrier and modulation radio frequency, message structure, protocol and content of the EGNOS message (detailed in the [[EGNOS Messages \| EGNOS Message Format ]] definition).		The EGNOS Signal In Space format is compliant with the ICAO SARPs for SBAS<ref>SARPS Amendment 77, Annex 10 to the Convention on International Civil Aviation, Aeronautical Telecommunications: International Standards and Recommended Practices, Volume 1, Radio Navigation Aids, November 2002.</ref> as stated in the [[EGNOS Open Service \| EGNOS Open Service]] Definition Document and the [[EGNOS Safety of Life Service\|EGNOS Safety of Life]] Service Definition Document.<ref name=" EGNOS OS SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Open Service Definition Document]</ref><ref name=" EGNOS SOL SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Safety of Life Service Definition Document]</ref> The EGNOS SIS interface characteristics comprise carrier and modulation radio frequency, message structure, protocol and content of the EGNOS message (detailed in the [[EGNOS Messages \| EGNOS Message Format ]] definition).

	EGNOS uses three GEO satellites at different longitude to broadcast its signals across the whole EGNOS service ~~areaSee~~ details in the [[EGNOS Space Segment \| EGNOS Space Segment]] article. The figure shows the most updated EGNOS GEO satellites coverage with a 5 degrees masking angle.		EGNOS uses three GEO satellites at different longitude to broadcast its signals across the whole EGNOS service area. See details in the [[EGNOS Space Segment \| EGNOS Space Segment]] article. The figure shows the most updated EGNOS GEO satellites coverage with a 5 degrees masking angle.

	Contrary to the case of core navigation space vehicles with active navigation payloads, the EGNOS GEO satellites carry transponders relaying the signal transmitted from the [[EGNOS Ground Segment\|ground segment]] uplink stations.<ref name=" EGNOS OS SDD"/>		Contrary to the case of core navigation space vehicles with active navigation payloads, the EGNOS GEO satellites carry transponders relaying the signal transmitted from the [[EGNOS Ground Segment\|ground segment]] uplink stations.<ref name=" EGNOS OS SDD"/>

← Older revision		Revision as of 10:56, 18 March 2020
Line 16:		Line 16:
	The EGNOS Signal In Space format is compliant with the ICAO SARPs for SBAS<ref>SARPS Amendment 77, Annex 10 to the Convention on International Civil Aviation, Aeronautical Telecommunications: International Standards and Recommended Practices, Volume 1, Radio Navigation Aids, November 2002.</ref> as stated in the [[EGNOS Open Service \| EGNOS Open Service]] Definition Document and the [[EGNOS Safety of Life Service\|EGNOS Safety of Life]] Service Definition Document.<ref name=" EGNOS OS SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Open Service Definition Document]</ref><ref name=" EGNOS SOL SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Safety of Life Service Definition Document]</ref> The EGNOS SIS interface characteristics comprise carrier and modulation radio frequency, message structure, protocol and content of the EGNOS message (detailed in the [[EGNOS Messages \| EGNOS Message Format ]] definition).		The EGNOS Signal In Space format is compliant with the ICAO SARPs for SBAS<ref>SARPS Amendment 77, Annex 10 to the Convention on International Civil Aviation, Aeronautical Telecommunications: International Standards and Recommended Practices, Volume 1, Radio Navigation Aids, November 2002.</ref> as stated in the [[EGNOS Open Service \| EGNOS Open Service]] Definition Document and the [[EGNOS Safety of Life Service\|EGNOS Safety of Life]] Service Definition Document.<ref name=" EGNOS OS SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Open Service Definition Document]</ref><ref name=" EGNOS SOL SDD">[http://www.essp-sas.eu/service_definition_documents EGNOS Safety of Life Service Definition Document]</ref> The EGNOS SIS interface characteristics comprise carrier and modulation radio frequency, message structure, protocol and content of the EGNOS message (detailed in the [[EGNOS Messages \| EGNOS Message Format ]] definition).

	EGNOS uses three GEO satellites at different longitude to broadcast its signals across the whole EGNOS service areaSee details in the [EGNOS Space Segment\|EGNOS Space Segment] article. The figure shows the most updated EGNOS GEO satellites coverage with a 5 degrees masking angle.		EGNOS uses three GEO satellites at different longitude to broadcast its signals across the whole EGNOS service areaSee details in the [[EGNOS Space Segment \| EGNOS Space Segment]] article. The figure shows the most updated EGNOS GEO satellites coverage with a 5 degrees masking angle.

	Contrary to the case of core navigation space vehicles with active navigation payloads, the EGNOS GEO satellites carry transponders relaying the signal transmitted from the [[EGNOS Ground Segment\|ground segment]] uplink stations.<ref name=" EGNOS OS SDD"/>		Contrary to the case of core navigation space vehicles with active navigation payloads, the EGNOS GEO satellites carry transponders relaying the signal transmitted from the [[EGNOS Ground Segment\|ground segment]] uplink stations.<ref name=" EGNOS OS SDD"/>