GALILEO Open Service - Revision history

Irene.Hidalgo: Redirected page to Galileo Open Service (OS)

2011-04-25T12:42:28Z

Redirected page to Galileo Open Service (OS)

← Older revision		Revision as of 12:42, 25 April 2011
Line 1:		Line 1:
	~~{{Article Infobox2~~		#REDIRECT [[Galileo Open Service (OS)]]
	~~\|Category=GALILEO~~
	~~\|Title={{PAGENAME}}~~
	~~\|Authors=GMV~~
	~~\|Level=Basic~~
	~~\|YearOfPublication=2011~~
	~~\|Logo=GMV~~
	}}

	~~The~~ [[GALILEO General Introduction\|GALILEO]] System will be an independent, global, European-controlled, satellite-based navigation system and will provide a number of guaranteed services to users equipped with Galileo-compatible receivers. The [[GALILEO Open Service]] results from a combination of open signals, free of user charge, and provides position and timing performance competitive with other GNSS systems.


	~~==Purpose==~~
	~~[[File:egnos_2.png‎\|300px\|Galileo Open Service\|thumb]]~~

	~~The~~ Galileo Open Service (OS) provides positioning, velocity and timing information that can be accessed free of direct user charge. This service is suitable for mass-market applications, such as in-car navigation and hybridisation with mobile telephones. The Open Service is accessible to any user equipped with a receiver, with no authorisation required. While up to three separate signal frequencies are offered within the Open Service, cheap single-frequency receivers will be used for applications requiring only reduced accuracy. In general, Open Service applications will use a combination of Galileo and GPS signals, which will improve performance in severe environments such as urban areas. The timing service is synchronised with UTC when used with receivers in fixed locations. This timing service can be used for applications such as network synchronisation or scientific applications.<ref name="GALHLD"> [http://ec.europa.eu/dgs/energy_transport/galileo/doc/galileo_hld_v3_23_09_02.pdf Galileo Mission High Level Definition], v3, September 2002.</ref>

	The Open Service does not offer integrity information, and the determination of the quality of the signals will be left entirely to the users. There will be no service guarantee or liability from the Galileo Operating Company on the Open Service.<ref name="ESA_GALILEO">[http://www.esa.int/esaNA/galileo.html ESA Galileo web page]</ref>


	~~[[File:Galileo Frequencies.gif‎\|200px\|Galileo Signal Frequencies\|left\|thumb]]~~

	~~==Performance and features==~~

	The [[GALILEO Signal Structure\|Galileo Open Service]] is realized by using the signals at L1, E5a and E5b, whether data or pilot. Several combinations are also possible, such as a dual frequency service based on using L1 and E5a (for best ionospheric error cancellation) or single frequency services (at L1, E5a, E5b or E5a and E5b together) in which case the ionospheric error is removed using a model, and even triple frequency services using all the signal together (L1, E5a and E5b), which can be exploited for very precise, centimetric applications.<ref name="ESA_GALILEO"/>.<ref>[http://ec.europa.eu/enterprise/policies/satnav/galileo/files/galileo-os-sis-icd-issue1-revision1_en.pdf Galileo OS SIS ICD Issue 1 Revision 1 September 2010e]</ref>

	The performance objectives in terms of position accuracy and availability will be competitive with respect to existing GNSS and further planned evolutions. In addition, the Open Service will also be interoperable with other GNSS, in order to facilitate the provision of combined services. <ref name="GALHLD"> [http://ec.europa.eu/dgs/energy_transport/galileo/doc/galileo_hld_v3_23_09_02.pdf Galileo Mission High Level Definition], v3, September 2002.</ref>

	~~{\| class="wikitable" align="center"~~
	~~\|+align="bottom" \|''Service Performances for Galileo Open Service''~~
	\|-
	~~! rowspan="2" \|~~
	~~! colspan="2"\| Galileo Open Service (positioning & timing)~~
	~~\|- align="center"~~
	~~! Single Frequency (SF)~~
	~~! Dual Frequency (DF)~~
	~~\|- align="center"~~
	~~! Coverage~~
	~~\| colspan="2"\| Global~~
	~~\|- align="center"~~
	~~! rowspan="2" \| Accuracy (95%)~~
	~~\| Horizontal: 15 m~~
	~~\| Horizontal: 4m~~
	~~\|- align="center"~~
	~~\| Vertical: 35 m~~
	~~\| Vertical: 8m~~
	~~\|- align="center"~~
	~~! Availability~~
	~~\| colspan="2"\| 99.8 %~~
	~~\|- align="center"~~
	~~! Timing Accuracy wrt UTC/TAI~~
	~~\| N/A~~
	~~\| 30 ns~~
	~~\|- align="center"~~
	~~! Ionospheric Correction~~
	~~\| Based on SF Model~~
	~~\| Based on DF Measurements~~
	~~\|- align="center"~~
	~~! Integrity~~
	~~\| colspan="2"\| No~~
	\|}

	~~To know more information about Performances of each Galileo Service see the article [[GALILEO Performances\|Galileo Performances]].~~

	~~==Implementation==~~
	The Open Service signals are separated in frequency to permit the correction of errors induced by ionospheric effects by differentiation of the ranging measurements made at each frequency. Each navigation frequency will include two ranging code signals (in-phase and quadrature). Data are added to one of the ranging codes while the other “pilot” ranging code is data-less for more precise
	~~and robust navigation measurements.~~

	During the Initial Operational Capability (IOC) phase, the GALILEO open service, the search and rescue service and the PRS will be provided. At this stage, however, accuracy and availability will not yet have reached their optimum levels.<ref name="Mid-term review">[http://ec.europa.eu/enterprise/newsroom/cf/_getdocument.cfm?doc_id=6321 Mid-term review of the European satellite radio navigation programmes]</ref>

	~~==Notes==~~
	~~<references group="footnotes"/>~~
	~~==References==~~
	~~<references/>~~

	~~[[Category:GALILEO~~]]

Irene.Hidalgo: /* Performance and features */

2011-04-13T08:44:35Z

Performance and features

← Older revision		Revision as of 08:44, 13 April 2011
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	\|- align="center"		\|- align="center"
	! Timing Accuracy wrt UTC/TAI		! Timing Accuracy wrt UTC/TAI
	\| ~~colspan="2"~~\| 30 ns		\| N/A
			\| 30 ns
	\|- align="center"		\|- align="center"
	! Ionospheric Correction		! Ionospheric Correction

Irene.Hidalgo at 14:32, 12 April 2011

2011-04-12T14:32:41Z

← Older revision		Revision as of 14:32, 12 April 2011
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	\| colspan="2"\| No		\| colspan="2"\| No
	\|}		\|}

			To know more information about Performances of each Galileo Service see the article [[GALILEO Performances\|Galileo Performances]].

	==Implementation==		==Implementation==
Line 65:		Line 67:

	During the Initial Operational Capability (IOC) phase, the GALILEO open service, the search and rescue service and the PRS will be provided. At this stage, however, accuracy and availability will not yet have reached their optimum levels.<ref name="Mid-term review">[http://ec.europa.eu/enterprise/newsroom/cf/_getdocument.cfm?doc_id=6321 Mid-term review of the European satellite radio navigation programmes]</ref>		During the Initial Operational Capability (IOC) phase, the GALILEO open service, the search and rescue service and the PRS will be provided. At this stage, however, accuracy and availability will not yet have reached their optimum levels.<ref name="Mid-term review">[http://ec.europa.eu/enterprise/newsroom/cf/_getdocument.cfm?doc_id=6321 Mid-term review of the European satellite radio navigation programmes]</ref>

	~~To know more information about Performances of each Galileo Service see the article [[GALILEO Performances\|Galileo Performances]].~~

	==Notes==		==Notes==

Irene.Hidalgo: /* Performance and features */

2011-04-12T09:26:29Z

Performance and features

@@ Line 28: / Line 28: @@
 {| class="wikitable" align="center"
 |-
 ! rowspan="2" |
@@ Line 57: / Line 58: @@
 ! Integrity
 | colspan="2"|          No
 |}

Irene.Hidalgo: /* Performance and features */

2011-04-12T09:24:14Z

Performance and features

← Older revision		Revision as of 09:24, 12 April 2011
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	! colspan="2"\| Galileo Open Service (positioning & timing)		! colspan="2"\| Galileo Open Service (positioning & timing)
	\|- align="center"		\|- align="center"
	! Single Frequency (SF)		! Single Frequency (SF)
	! Dual Frequency (DF)		! Dual Frequency (DF)
	\|- align="center"		\|- align="center"

Irene.Hidalgo: /* Performance and features */

2011-04-12T09:23:59Z

Performance and features

← Older revision		Revision as of 09:23, 12 April 2011
Line 32:		Line 32:
	! colspan="2"\| Galileo Open Service (positioning & timing)		! colspan="2"\| Galileo Open Service (positioning & timing)
	\|- align="center"		\|- align="center"
	! Single Frequency		! Single Frequency (SF)
	! Dual Frequency		! Dual Frequency (DF)
	\|- align="center"		\|- align="center"
	! Coverage		! Coverage

Irene.Hidalgo: /* Performance and features */

2011-04-12T09:23:30Z

Performance and features

← Older revision		Revision as of 09:23, 12 April 2011
Line 36:		Line 36:
	\|- align="center"		\|- align="center"
	! Coverage		! Coverage
	\| colspan="2"\| Global		\| colspan="2"\| Global
	\|- align="center"		\|- align="center"
	! rowspan="2" \| Accuracy (95%)		! rowspan="2" \| Accuracy (95%)
Line 46:		Line 46:
	\|- align="center"		\|- align="center"
	! Availability		! Availability
	\| colspan="2"\| 99.8 %		\| colspan="2"\| 99.8 %
	\|- align="center"		\|- align="center"
	! Timing Accuracy wrt UTC/TAI		! Timing Accuracy wrt UTC/TAI
Line 56:		Line 56:
	\|- align="center"		\|- align="center"
	! Integrity		! Integrity
	\| colspan="2"\| No		\| colspan="2"\| No
	\|}		\|}

Irene.Hidalgo: /* Performance and features */

2011-04-12T09:23:03Z

Performance and features

← Older revision		Revision as of 09:23, 12 April 2011
Line 31:		Line 31:
	! rowspan="2" \|		! rowspan="2" \|
	! colspan="2"\| Galileo Open Service (positioning & timing)		! colspan="2"\| Galileo Open Service (positioning & timing)
	\|-		\|- align="center"
	! Single Frequency		! Single Frequency
	! Dual Frequency		! Dual Frequency
	\|-		\|- align="center"
	! Coverage		! Coverage
	\| colspan="2"\| Global		\| colspan="2"\| Global
	\|-		\|- align="center"
	! rowspan="2" \| Accuracy (95%)		! rowspan="2" \| Accuracy (95%)
	\| Horizontal: 15 m		\| Horizontal: 15 m
	\| Horizontal: 4m		\| Horizontal: 4m
	\|-		\|- align="center"
	\| Vertical: 35 m		\| Vertical: 35 m
	\| Vertical: 8m		\| Vertical: 8m
	\|-		\|- align="center"
	! Availability		! Availability
	\| colspan="2"\| 99.8 %		\| colspan="2"\| 99.8 %
	\|-		\|- align="center"
	! Timing Accuracy wrt UTC/TAI		! Timing Accuracy wrt UTC/TAI
	\| colspan="2"\| 30 ns		\| colspan="2"\| 30 ns
	\|-		\|- align="center"
	! Ionospheric Correction		! Ionospheric Correction
	\| Based on SF Model		\| Based on SF Model
	\| Based on DF Measurements		\| Based on DF Measurements
	\|-		\|- align="center"
	! Integrity		! Integrity
	\| colspan="2"\| No		\| colspan="2"\| No

Irene.Hidalgo: /* Performance and features */

2011-04-12T09:21:13Z

Performance and features

← Older revision		Revision as of 09:21, 12 April 2011
Line 27:		Line 27:
	The performance objectives in terms of position accuracy and availability will be competitive with respect to existing GNSS and further planned evolutions. In addition, the Open Service will also be interoperable with other GNSS, in order to facilitate the provision of combined services. <ref name="GALHLD"> [http://ec.europa.eu/dgs/energy_transport/galileo/doc/galileo_hld_v3_23_09_02.pdf Galileo Mission High Level Definition], v3, September 2002.</ref>		The performance objectives in terms of position accuracy and availability will be competitive with respect to existing GNSS and further planned evolutions. In addition, the Open Service will also be interoperable with other GNSS, in order to facilitate the provision of combined services. <ref name="GALHLD"> [http://ec.europa.eu/dgs/energy_transport/galileo/doc/galileo_hld_v3_23_09_02.pdf Galileo Mission High Level Definition], v3, September 2002.</ref>

	{\| class="wikitable"		{\| class="wikitable" align="center"
	\|-		\|-
	! rowspan="2" \|		! rowspan="2" \|

Irene.Hidalgo: /* Performance and features */

2011-04-12T09:20:35Z

Performance and features

← Older revision		Revision as of 09:20, 12 April 2011
Line 32:		Line 32:
	! colspan="2"\| Galileo Open Service (positioning & timing)		! colspan="2"\| Galileo Open Service (positioning & timing)
	\|-		\|-
	! Single Frequency		! Single Frequency
	! Dual Frequency		! Dual Frequency
	\|-		\|-

← Older revision		Revision as of 12:42, 25 April 2011
Line 1:		Line 1:
	~~{{Article Infobox2~~		#REDIRECT [[Galileo Open Service (OS)]]
	~~\|Category=GALILEO~~
	~~\|Title={{PAGENAME}}~~
	~~\|Authors=GMV~~
	~~\|Level=Basic~~
	~~\|YearOfPublication=2011~~
	~~\|Logo=GMV~~
	}}

	~~The~~ [[GALILEO General Introduction\|GALILEO]] System will be an independent, global, European-controlled, satellite-based navigation system and will provide a number of guaranteed services to users equipped with Galileo-compatible receivers. The [[GALILEO Open Service]] results from a combination of open signals, free of user charge, and provides position and timing performance competitive with other GNSS systems.


	~~==Purpose==~~
	~~[[File:egnos_2.png‎\|300px\|Galileo Open Service\|thumb]]~~

	~~The~~ Galileo Open Service (OS) provides positioning, velocity and timing information that can be accessed free of direct user charge. This service is suitable for mass-market applications, such as in-car navigation and hybridisation with mobile telephones. The Open Service is accessible to any user equipped with a receiver, with no authorisation required. While up to three separate signal frequencies are offered within the Open Service, cheap single-frequency receivers will be used for applications requiring only reduced accuracy. In general, Open Service applications will use a combination of Galileo and GPS signals, which will improve performance in severe environments such as urban areas. The timing service is synchronised with UTC when used with receivers in fixed locations. This timing service can be used for applications such as network synchronisation or scientific applications.<ref name="GALHLD"> [http://ec.europa.eu/dgs/energy_transport/galileo/doc/galileo_hld_v3_23_09_02.pdf Galileo Mission High Level Definition], v3, September 2002.</ref>

	The Open Service does not offer integrity information, and the determination of the quality of the signals will be left entirely to the users. There will be no service guarantee or liability from the Galileo Operating Company on the Open Service.<ref name="ESA_GALILEO">[http://www.esa.int/esaNA/galileo.html ESA Galileo web page]</ref>


	~~[[File:Galileo Frequencies.gif‎\|200px\|Galileo Signal Frequencies\|left\|thumb]]~~

	~~==Performance and features==~~

	The [[GALILEO Signal Structure\|Galileo Open Service]] is realized by using the signals at L1, E5a and E5b, whether data or pilot. Several combinations are also possible, such as a dual frequency service based on using L1 and E5a (for best ionospheric error cancellation) or single frequency services (at L1, E5a, E5b or E5a and E5b together) in which case the ionospheric error is removed using a model, and even triple frequency services using all the signal together (L1, E5a and E5b), which can be exploited for very precise, centimetric applications.<ref name="ESA_GALILEO"/>.<ref>[http://ec.europa.eu/enterprise/policies/satnav/galileo/files/galileo-os-sis-icd-issue1-revision1_en.pdf Galileo OS SIS ICD Issue 1 Revision 1 September 2010e]</ref>

	The performance objectives in terms of position accuracy and availability will be competitive with respect to existing GNSS and further planned evolutions. In addition, the Open Service will also be interoperable with other GNSS, in order to facilitate the provision of combined services. <ref name="GALHLD"> [http://ec.europa.eu/dgs/energy_transport/galileo/doc/galileo_hld_v3_23_09_02.pdf Galileo Mission High Level Definition], v3, September 2002.</ref>

	~~{\| class="wikitable" align="center"~~
	~~\|+align="bottom" \|''Service Performances for Galileo Open Service''~~
	\|-
	~~! rowspan="2" \|~~
	~~! colspan="2"\| Galileo Open Service (positioning & timing)~~
	~~\|- align="center"~~
	~~! Single Frequency (SF)~~
	~~! Dual Frequency (DF)~~
	~~\|- align="center"~~
	~~! Coverage~~
	~~\| colspan="2"\| Global~~
	~~\|- align="center"~~
	~~! rowspan="2" \| Accuracy (95%)~~
	~~\| Horizontal: 15 m~~
	~~\| Horizontal: 4m~~
	~~\|- align="center"~~
	~~\| Vertical: 35 m~~
	~~\| Vertical: 8m~~
	~~\|- align="center"~~
	~~! Availability~~
	~~\| colspan="2"\| 99.8 %~~
	~~\|- align="center"~~
	~~! Timing Accuracy wrt UTC/TAI~~
	~~\| N/A~~
	~~\| 30 ns~~
	~~\|- align="center"~~
	~~! Ionospheric Correction~~
	~~\| Based on SF Model~~
	~~\| Based on DF Measurements~~
	~~\|- align="center"~~
	~~! Integrity~~
	~~\| colspan="2"\| No~~
	\|}

	~~To know more information about Performances of each Galileo Service see the article [[GALILEO Performances\|Galileo Performances]].~~

	~~==Implementation==~~
	The Open Service signals are separated in frequency to permit the correction of errors induced by ionospheric effects by differentiation of the ranging measurements made at each frequency. Each navigation frequency will include two ranging code signals (in-phase and quadrature). Data are added to one of the ranging codes while the other “pilot” ranging code is data-less for more precise
	~~and robust navigation measurements.~~

	During the Initial Operational Capability (IOC) phase, the GALILEO open service, the search and rescue service and the PRS will be provided. At this stage, however, accuracy and availability will not yet have reached their optimum levels.<ref name="Mid-term review">[http://ec.europa.eu/enterprise/newsroom/cf/_getdocument.cfm?doc_id=6321 Mid-term review of the European satellite radio navigation programmes]</ref>

	~~==Notes==~~
	~~<references group="footnotes"/>~~
	~~==References==~~
	~~<references/>~~

	~~[[Category:GALILEO~~]]