Galileo High Accuracy Service (HAS) - Revision history

Gema.Cueto at 11:56, 30 June 2025

2025-06-30T11:56:13Z

Gema.Cueto: /* Galileo HAS Service Levels */

2021-08-27T10:40:10Z

Galileo HAS Service Levels

← Older revision		Revision as of 10:40, 27 August 2021
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	\| CONVERGENCE TIME		\| CONVERGENCE TIME
	\| < 300 s		\| < 300 s
	\| < ~~400~~ s		\| < 100 s
	\|- align="center"		\|- align="center"
	\| AVAILABILITY		\| AVAILABILITY

Gema.Cueto: /* Galileo HAS Roadmap */

2021-05-21T10:18:33Z

Galileo HAS Roadmap

← Older revision		Revision as of 10:18, 21 May 2021
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	===Galileo HAS Roadmap===		===Galileo HAS Roadmap===
	Galileo High Accuracy service will be implemented in a three-step approach<ref name="HAS_note"/>:		Galileo High Accuracy service will be implemented in a three-step approach<ref name="HAS_note"/><ref name="HAS_GSC"/>:
	*Phase 0 (HA testing and experimentation) focusing on activities aimed at validating Galileo’s dissemination capabilities through the E6B channel and performing initial high-accuracy testing. Internal testing is ongoing since 2019. HAS SiS tests are planned to be executed from Q1 2021 and since May 2021 users equipped with an receiver capable of acquiring E6-B signal and extracting its data content may detect changes in the signal.<ref>[https://insidegnss.com/186374-2/ Inside GNSS "Officially Underway and Open to Users for Testing: Galileo’s High Accuracy Service"]</ref>		*Phase 0 (HA testing and experimentation) focusing on activities aimed at validating Galileo’s dissemination capabilities through the E6B channel and performing initial high-accuracy testing. Internal testing is ongoing since 2019. HAS SiS tests are planned to be executed from Q1 2021 and since May 2021 users equipped with an receiver capable of acquiring E6-B signal and extracting its data content may detect changes in the signal.<ref>[https://insidegnss.com/186374-2/ Inside GNSS "Officially Underway and Open to Users for Testing: Galileo’s High Accuracy Service"]</ref>
	*Phase 1 (HA Initial Service). Provision of an initial Galileo High Accuracy Service resulting from the implementation of a high-accuracy data generation system processing Galileo system data only. The HA initial service will deliver Service Level 1 only with a reduced performance (below the full service’s targets).This stage is expected from 2022 onwards.		*Phase 1 (HA Initial Service). Provision of an initial Galileo High Accuracy Service resulting from the implementation of a high-accuracy data generation system processing Galileo system data only. The HA initial service will deliver Service Level 1 only with a reduced performance (below the full service’s targets).This stage is expected from 2022 onwards.

Gema.Cueto: /* Galileo HAS High Level Architecture */

2021-05-21T10:18:00Z

Galileo HAS High Level Architecture

← Older revision		Revision as of 10:18, 21 May 2021
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	===Galileo HAS High Level Architecture===		===Galileo HAS High Level Architecture===

	The Galileo system elements involved in the provision of Galileo High Accuracy Service are<ref>[https://www.gsc-europa.eu/galileo/services/galileo-high-accuracy-service-has Galileo HAS in GSC website]</ref>:		The Galileo system elements involved in the provision of Galileo High Accuracy Service are<ref name="HAS_GSC">[https://www.gsc-europa.eu/galileo/services/galileo-high-accuracy-service-has Galileo HAS in GSC website]</ref>:
	*High Accuracy Data Generator (HADG) receives data from the Galileo Sensor Stations (GSS) and generates corrections for Galileo and GPS.		*High Accuracy Data Generator (HADG) receives data from the Galileo Sensor Stations (GSS) and generates corrections for Galileo and GPS.
	*The High Accuracy (HA) corrections are sent in real time to the Galileo core infrastructure.		*The High Accuracy (HA) corrections are sent in real time to the Galileo core infrastructure.

Gema.Cueto: /* Galileo HAS Roadmap */

2021-05-21T10:16:01Z

Galileo HAS Roadmap

← Older revision		Revision as of 10:16, 21 May 2021
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	Galileo High Accuracy service will be implemented in a three-step approach<ref name="HAS_note"/>:		Galileo High Accuracy service will be implemented in a three-step approach<ref name="HAS_note"/>:
	*Phase 0 (HA testing and experimentation) focusing on activities aimed at validating Galileo’s dissemination capabilities through the E6B channel and performing initial high-accuracy testing. Internal testing is ongoing since 2019. HAS SiS tests are planned to be executed from Q1 2021 and since May 2021 users equipped with an receiver capable of acquiring E6-B signal and extracting its data content may detect changes in the signal.<ref>[https://insidegnss.com/186374-2/ Inside GNSS "Officially Underway and Open to Users for Testing: Galileo’s High Accuracy Service"]</ref>		*Phase 0 (HA testing and experimentation) focusing on activities aimed at validating Galileo’s dissemination capabilities through the E6B channel and performing initial high-accuracy testing. Internal testing is ongoing since 2019. HAS SiS tests are planned to be executed from Q1 2021 and since May 2021 users equipped with an receiver capable of acquiring E6-B signal and extracting its data content may detect changes in the signal.<ref>[https://insidegnss.com/186374-2/ Inside GNSS "Officially Underway and Open to Users for Testing: Galileo’s High Accuracy Service"]</ref>
	*Phase 1 (HA Initial Service). Provision of an initial Galileo High Accuracy Service resulting from the implementation of a high-accuracy data generation system processing Galileo system data only. The HA initial service will deliver Service Level 1 only with a reduced performance (below the full service’s targets).		*Phase 1 (HA Initial Service). Provision of an initial Galileo High Accuracy Service resulting from the implementation of a high-accuracy data generation system processing Galileo system data only. The HA initial service will deliver Service Level 1 only with a reduced performance (below the full service’s targets).This stage is expected from 2022 onwards.
	*Phase 2 (HA Full Service). Full provision of the Galileo High Accuracy Service, Service Level 1 and Service Level 2, fulfilling its target performance (e.g. 20cm positioning performance).		*Phase 2 (HA Full Service). Full provision of the Galileo High Accuracy Service starting from 2024, including Service Level 1 and Service Level 2, fulfilling its target performance (e.g. 20cm positioning performance).
	[[File:Applications_HAS.png\|550px\|Galileo HAS Roadmap (source: [https://www.gsc-europa.eu/galileo/services/galileo-high-accuracy-service-has European GNSS Service Centre])\|centre\|thumb]]		[[File:Applications_HAS.png\|550px\|Galileo HAS Roadmap (source: [https://www.gsc-europa.eu/galileo/services/galileo-high-accuracy-service-has European GNSS Service Centre])\|centre\|thumb]]

Gema.Cueto: /* Galileo HAS Roadmap */

2021-05-20T15:15:01Z

Galileo HAS Roadmap

← Older revision		Revision as of 15:15, 20 May 2021
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	===Galileo HAS Roadmap===		===Galileo HAS Roadmap===
	Galileo High Accuracy service will be implemented in a three-step approach<ref name="HAS_note">:		Galileo High Accuracy service will be implemented in a three-step approach<ref name="HAS_note"/>:
	*Phase 0 (HA testing and experimentation) focusing on activities aimed at validating Galileo’s dissemination capabilities through the E6B channel and performing initial high-accuracy testing. Internal testing is ongoing since 2019. HAS SiS tests are planned to be executed from Q1 2021 and since May 2021 users equipped with an receiver capable of acquiring E6-B signal and extracting its data content may detect changes in the signal.<ref>[https://insidegnss.com/186374-2/ Inside GNSS "Officially Underway and Open to Users for Testing: Galileo’s High Accuracy Service"]</ref>		*Phase 0 (HA testing and experimentation) focusing on activities aimed at validating Galileo’s dissemination capabilities through the E6B channel and performing initial high-accuracy testing. Internal testing is ongoing since 2019. HAS SiS tests are planned to be executed from Q1 2021 and since May 2021 users equipped with an receiver capable of acquiring E6-B signal and extracting its data content may detect changes in the signal.<ref>[https://insidegnss.com/186374-2/ Inside GNSS "Officially Underway and Open to Users for Testing: Galileo’s High Accuracy Service"]</ref>
	*Phase 1 (HA Initial Service). Provision of an initial Galileo High Accuracy Service resulting from the implementation of a high-accuracy data generation system processing Galileo system data only. The HA initial service will deliver Service Level 1 only with a reduced performance (below the full service’s targets).		*Phase 1 (HA Initial Service). Provision of an initial Galileo High Accuracy Service resulting from the implementation of a high-accuracy data generation system processing Galileo system data only. The HA initial service will deliver Service Level 1 only with a reduced performance (below the full service’s targets).

Gema.Cueto at 15:14, 20 May 2021

2021-05-20T15:14:33Z

Gema.Cueto: /* Galileo HAS Roadmap */

2021-05-20T15:05:03Z

Galileo HAS Roadmap

← Older revision		Revision as of 15:05, 20 May 2021
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	===Galileo HAS Roadmap===		===Galileo HAS Roadmap===
	Galileo High Accuracy service will be implemented in a three-step approach:		Galileo High Accuracy service will be implemented in a three-step approach<ref>[https://www.gsc-europa.eu/sites/default/files/sites/all/files/Galileo_HAS_Info_Note.pdf Galileo High Accuracy Service, Info Note]</ref>:
	*Phase 0 (HA testing and experimentation) focusing on activities aimed at validating Galileo’s dissemination capabilities through the E6B channel and performing initial high-accuracy testing. Internal testing is ongoing since 2019. HAS SiS tests are planned to be executed from Q1 2021 and since May 2021 users equipped with an receiver capable of acquiring E6-B signal and extracting its data content may detect changes in the signal.		*Phase 0 (HA testing and experimentation) focusing on activities aimed at validating Galileo’s dissemination capabilities through the E6B channel and performing initial high-accuracy testing. Internal testing is ongoing since 2019. HAS SiS tests are planned to be executed from Q1 2021 and since May 2021 users equipped with an receiver capable of acquiring E6-B signal and extracting its data content may detect changes in the signal.<ref>[https://insidegnss.com/186374-2/ Inside GNSS "Officially Underway and Open to Users for Testing: Galileo’s High Accuracy Service"]</ref>
	*Phase 1 (HA Initial Service). Provision of an initial Galileo High Accuracy Service resulting from the implementation of a high-accuracy data generation system processing Galileo system data only. The HA initial service will deliver Service Level 1 only with a reduced performance (below the full service’s targets).		*Phase 1 (HA Initial Service). Provision of an initial Galileo High Accuracy Service resulting from the implementation of a high-accuracy data generation system processing Galileo system data only. The HA initial service will deliver Service Level 1 only with a reduced performance (below the full service’s targets).
	*Phase 2 (HA Full Service). Full provision of the Galileo High Accuracy Service, Service Level 1 and Service Level 2, fulfilling its target performance (e.g. 20cm positioning performance).		*Phase 2 (HA Full Service). Full provision of the Galileo High Accuracy Service, Service Level 1 and Service Level 2, fulfilling its target performance (e.g. 20cm positioning performance).

Gema.Cueto: /* Galileo HAS Roadmap */

2021-05-20T15:03:20Z

Galileo HAS Roadmap

← Older revision		Revision as of 15:03, 20 May 2021
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	===Galileo HAS Roadmap===		===Galileo HAS Roadmap===
	[[File:Applications_HAS.png\|550px\|Galileo HAS Roadmap (source:[https://www.gsc-europa.eu/galileo/services/galileo-high-accuracy-service-has European GNSS Service Centre])\|centre\|thumb]]		Galileo High Accuracy service will be implemented in a three-step approach:
			*Phase 0 (HA testing and experimentation) focusing on activities aimed at validating Galileo’s dissemination capabilities through the E6B channel and performing initial high-accuracy testing. Internal testing is ongoing since 2019. HAS SiS tests are planned to be executed from Q1 2021 and since May 2021 users equipped with an receiver capable of acquiring E6-B signal and extracting its data content may detect changes in the signal.
			*Phase 1 (HA Initial Service). Provision of an initial Galileo High Accuracy Service resulting from the implementation of a high-accuracy data generation system processing Galileo system data only. The HA initial service will deliver Service Level 1 only with a reduced performance (below the full service’s targets).
			*Phase 2 (HA Full Service). Full provision of the Galileo High Accuracy Service, Service Level 1 and Service Level 2, fulfilling its target performance (e.g. 20cm positioning performance).
			[[File:Applications_HAS.png\|550px\|Galileo HAS Roadmap (source: [https://www.gsc-europa.eu/galileo/services/galileo-high-accuracy-service-has European GNSS Service Centre])\|centre\|thumb]]

	==Credits==		==Credits==

Gema.Cueto: /* Galileo HAS Roadmap */

2021-05-20T14:56:35Z

Galileo HAS Roadmap

← Older revision		Revision as of 14:56, 20 May 2021
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	===Galileo HAS Roadmap===		===Galileo HAS Roadmap===
	[[File:Applications_HAS.png\|550px\|~~Summary of most relevant~~ Galileo HAS ~~target applications,~~ source:[https://www.gsc-europa.eu/galileo/services/galileo-high-accuracy-service-has European GNSS Service Centre]\|centre\|thumb]]		[[File:Applications_HAS.png\|550px\|Galileo HAS Roadmap (source:[https://www.gsc-europa.eu/galileo/services/galileo-high-accuracy-service-has European GNSS Service Centre])\|centre\|thumb]]

	==Credits==		==Credits==

← Older revision		Revision as of 11:56, 30 June 2025
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	The High Accuracy Service (HAS) is aimed at market applications (professional or commercial) requiring higher performance than offered by the Open Service.<ref name="Mid-term review">[https://www.gsa.europa.eu/galileo/services Galileo Services in GSA website]</ref> It provides added value services on a free charge basis, with content and format of data publicly and openly available on a global scale. Galileo HAS uses combination of signals in E6 band: a data (E6-B) component and a pilot (E6-C) component, plus the reserved-1 fields in the Open Service I/NAV disseminated through the E1-B. E6 signals are modulated with a binary phase shift keying BPSK(5) at a carrier frequency of 1278.75 MHz, which is used by all satellites and shared through a code division multiple access (CDMA) RF channel access method. Therefore, the signal main lobe and most of the signal power is in the 1273.75-1283.75 MHz band. This combination of E6 signals plus the bits in I/NAV message provides higher data throughput rate and higher accuracy authenticated data.		The High Accuracy Service (HAS) is aimed at market applications (professional or commercial) requiring higher performance than offered by the Open Service.<ref name="Mid-term review">[https://www.gsa.europa.eu/galileo/services Galileo Services in GSA website]</ref> It provides added value services on a free charge basis, with content and format of data publicly and openly available on a global scale. Galileo HAS uses combination of signals in E6 band: a data (E6-B) component and a pilot (E6-C) component, plus the reserved-1 fields in the Open Service I/NAV disseminated through the E1-B. E6 signals are modulated with a binary phase shift keying BPSK(5) at a carrier frequency of 1278.75 MHz, which is used by all satellites and shared through a code division multiple access (CDMA) RF channel access method. Therefore, the signal main lobe and most of the signal power is in the 1273.75-1283.75 MHz band. This combination of E6 signals plus the bits in I/NAV message provides higher data throughput rate and higher accuracy authenticated data.

	The foreseen applications will be based on: <ref name="Galileo ~~CS Demonstrator website~~">[~~http~~://www.~~galileo~~-~~csdemo~~.eu/ Galileo ~~CS Demonstrator website~~]</ref>		The foreseen applications will be based on:<ref name="Galileo HAS Performance Reports">[https://www.gsc-europa.eu/electronic-library/performance-reports/galileo-high-accuracy-service-has Galileo HAS Performance Reports]</ref>
	* Dissemination of data with a rate of 448 bps, for added value services;		* Dissemination of data with a rate of 448 bps, for added value services.
	* Broadcasting of one signal, separated in frequency from the Open Services signals in differential applications to facilitate advanced applications such as integration of Galileo positioning applications with wireless communications networks, high accuracy positioning and indoor navigation.		* Broadcasting of one signal, separated in frequency from the Open Services signals in differential applications to facilitate advanced applications such as integration of Galileo positioning applications with wireless communications networks, high accuracy positioning and indoor navigation.

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	==Performance and features==		==Performance and features==
	The main features foreseen for Galileo High Accuracy Service are authentication and high accuracy<ref name="Galileo ~~CS Demonstrator website~~">[~~http~~://www.~~galileo~~-~~csdemo~~.eu/ Galileo ~~CS Demonstrator website~~]</ref>. In addition, corrections will be accessible through two dissemination channels: E6-B signal in space and a terrestrial link. High accuracy corrections will follow a similar format to Compact-State Space Representation (CSSR).		The main features foreseen for Galileo High Accuracy Service are authentication and high accuracy<ref name="Galileo HAS Performance Reports">[https://www.gsc-europa.eu/electronic-library/performance-reports/galileo-high-accuracy-service-has Galileo HAS Performance Reports]</ref>. In addition, corrections will be accessible through two dissemination channels: E6-B signal in space and a terrestrial link. High accuracy corrections will follow a similar format to Compact-State Space Representation (CSSR).

	===Authentication===		===Authentication===
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	===High Accuracy===		===High Accuracy===

	High accuracy is generally understood as a positioning accuracy on the order of a few ~~centimeters~~. Two primary approaches have been used in the past years to provide high accuracy: real time kinematic (RTK) and precise point positioning (PPP). The main advantage of using PPP instead of RTK is that it provides a global and absolute positioning and timing service without the need for nearby reference stations.		High accuracy is generally understood as a positioning accuracy on the order of a few centimetres. Two primary approaches have been used in the past years to provide high accuracy: real time kinematic (RTK) and precise point positioning (PPP). The main advantage of using PPP instead of RTK is that it provides a global and absolute positioning and timing service without the need for nearby reference stations.
	PPP is based on the use of accurate GNSS satellite orbits and clock data to estimate a user position based on carrier phase measurements, where the ionospheric delay is typically removed by performing the iono-free combination.		PPP is based on the use of accurate GNSS satellite orbits and clock data to estimate a user position based on carrier phase measurements, where the ionospheric delay is typically removed by performing the iono-free combination.

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	Galileo High Accuracy service will be implemented in a three-step approach<ref name="HAS_note"/><ref name="HAS_GSC"/>:		Galileo High Accuracy service will be implemented in a three-step approach<ref name="HAS_note"/><ref name="HAS_GSC"/>:
	*Phase 0 (HA testing and experimentation) focusing on activities aimed at validating Galileo’s dissemination capabilities through the E6B channel and performing initial high-accuracy testing. Internal testing is ongoing since 2019. HAS SiS tests are planned to be executed from Q1 2021 and since May 2021 users equipped with an receiver capable of acquiring E6-B signal and extracting its data content may detect changes in the signal.<ref>[https://insidegnss.com/186374-2/ Inside GNSS "Officially Underway and Open to Users for Testing: Galileo’s High Accuracy Service"]</ref>		*Phase 0 (HA testing and experimentation) focusing on activities aimed at validating Galileo’s dissemination capabilities through the E6B channel and performing initial high-accuracy testing. Internal testing is ongoing since 2019. HAS SiS tests are planned to be executed from Q1 2021 and since May 2021 users equipped with an receiver capable of acquiring E6-B signal and extracting its data content may detect changes in the signal.<ref>[https://insidegnss.com/186374-2/ Inside GNSS "Officially Underway and Open to Users for Testing: Galileo’s High Accuracy Service"]</ref>
	*Phase 1 (HA Initial Service). Provision of an initial Galileo High Accuracy Service resulting from the implementation of a high-accuracy data generation system processing Galileo system data only. The HA initial service will deliver Service Level 1 only with a reduced performance (below the full service’s targets)~~.This stage is expected from 2022 onwards~~.		*Phase 1 (HA Initial Service). Provision of an initial Galileo High Accuracy Service resulting from the implementation of a high-accuracy data generation system processing Galileo system data only. The HA initial service will deliver Service Level 1 only with a reduced performance (below the full service’s targets).
	*Phase 2 (HA Full Service). Full provision of the Galileo High Accuracy Service starting from ~~2024~~, including Service Level 1 and Service Level 2, fulfilling its target performance (e.g. ~~20cm~~ positioning performance).		*Phase 2 (HA Full Service). Full provision of the Galileo High Accuracy Service starting from 2023, including Service Level 1 and Service Level 2, fulfilling its target performance (e.g. 20 cm positioning performance).
	[[File:Applications_HAS.png\|550px\|Galileo HAS Roadmap (source: [https://www.gsc-europa.eu/galileo/services/galileo-high-accuracy-service-has European GNSS Service Centre])\|centre\|thumb]]		[[File:Applications_HAS.png\|550px\|Galileo HAS Roadmap (source: [https://www.gsc-europa.eu/galileo/services/galileo-high-accuracy-service-has European GNSS Service Centre])\|centre\|thumb]]

← Older revision		Revision as of 15:14, 20 May 2021
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	==Galileo HAS Service Levels==		==Galileo HAS Service Levels==
	The HAS comprises two services levels<ref>[https://www.gsc-europa.eu/sites/default/files/sites/all/files/Galileo_HAS_Info_Note.pdf Galileo High Accuracy Service, Info Note]</ref>:		The HAS comprises two services levels<ref name="HAS_note">[https://www.gsc-europa.eu/sites/default/files/sites/all/files/Galileo_HAS_Info_Note.pdf Galileo High Accuracy Service, Info Note]</ref>:
	*Service Level 1 (SL1) with global coverage; providing high accuracy corrections (orbits, clocks) and biases (code and phase) for Galileo E1/E5b/E5a/E6 and E5AltBOC and GPS L1/L5/L2 signals.		*Service Level 1 (SL1) with global coverage; providing high accuracy corrections (orbits, clocks) and biases (code and phase) for Galileo E1/E5b/E5a/E6 and E5AltBOC and GPS L1/L5/L2 signals.
	*Service Level 2 (SL2): with regional coverage; providing SL1 corrections plus atmospheric (at least ionospheric) corrections and potential additional biases.		*Service Level 2 (SL2): with regional coverage; providing SL1 corrections plus atmospheric (at least ionospheric) corrections and potential additional biases.
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	{\| class="wikitable" align="center"		{\| class="wikitable" align="center"
	\|+align="bottom" \|''Table 1- Main HAS characteristics and target performances<ref~~>[https:~~/~~/www.gsc-europa.eu/sites/default/files/sites/all/files/Galileo_HAS_Info_Note.pdf Galileo High Accuracy Service, Info Note]</ref~~>''		\|+align="bottom" \|''Table 1- Main HAS characteristics and target performances<ref name="HAS_note"/>''
	\|-		\|-
	! HAS		! HAS
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	===Galileo HAS Roadmap===		===Galileo HAS Roadmap===
	Galileo High Accuracy service will be implemented in a three-step approach<ref~~>[https://www.gsc-europa.eu/sites/default/files/sites/all/files/Galileo_HAS_Info_Note.pdf Galileo High Accuracy Service, Info Note]</ref~~>:		Galileo High Accuracy service will be implemented in a three-step approach<ref name="HAS_note">:
	*Phase 0 (HA testing and experimentation) focusing on activities aimed at validating Galileo’s dissemination capabilities through the E6B channel and performing initial high-accuracy testing. Internal testing is ongoing since 2019. HAS SiS tests are planned to be executed from Q1 2021 and since May 2021 users equipped with an receiver capable of acquiring E6-B signal and extracting its data content may detect changes in the signal.<ref>[https://insidegnss.com/186374-2/ Inside GNSS "Officially Underway and Open to Users for Testing: Galileo’s High Accuracy Service"]</ref>		*Phase 0 (HA testing and experimentation) focusing on activities aimed at validating Galileo’s dissemination capabilities through the E6B channel and performing initial high-accuracy testing. Internal testing is ongoing since 2019. HAS SiS tests are planned to be executed from Q1 2021 and since May 2021 users equipped with an receiver capable of acquiring E6-B signal and extracting its data content may detect changes in the signal.<ref>[https://insidegnss.com/186374-2/ Inside GNSS "Officially Underway and Open to Users for Testing: Galileo’s High Accuracy Service"]</ref>
	*Phase 1 (HA Initial Service). Provision of an initial Galileo High Accuracy Service resulting from the implementation of a high-accuracy data generation system processing Galileo system data only. The HA initial service will deliver Service Level 1 only with a reduced performance (below the full service’s targets).		*Phase 1 (HA Initial Service). Provision of an initial Galileo High Accuracy Service resulting from the implementation of a high-accuracy data generation system processing Galileo system data only. The HA initial service will deliver Service Level 1 only with a reduced performance (below the full service’s targets).