EGNOS Open Service - Revision history

Gema.Cueto at 14:04, 18 March 2020

2020-03-18T14:04:21Z

Gema.Cueto at 06:18, 19 March 2019

2019-03-19T06:18:28Z

← Older revision		Revision as of 06:18, 19 March 2019
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	Consequently, MOPS intends to support aviation use and provides a series of features to guarantee integrity which, as expressed in EGNOS OS Service Definition Document,<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>''may result in degraded performance over what could be reached if implementing a tailored processing of EGNOS signals for OS,'' due to the stringent aviation requirements.		Consequently, MOPS intends to support aviation use and provides a series of features to guarantee integrity which, as expressed in EGNOS OS Service Definition Document,<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>''may result in degraded performance over what could be reached if implementing a tailored processing of EGNOS signals for OS,'' due to the stringent aviation requirements.

	[[File:~~Egnos os service area~~.png\|EGNOS OS Compliance Area (From EGNOS OS-SDD)<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>\|200px\|thumb\|right]]		[[File:EGNOS OS.png\|EGNOS OS Compliance Area (From EGNOS OS-SDD)<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>\|200px\|thumb\|right]]

	Typically, all SBAS receivers designed to support OS shall:<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>		Typically, all SBAS receivers designed to support OS shall:<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>

Gema.Cueto at 09:31, 28 February 2019

2019-02-28T09:31:52Z

← Older revision		Revision as of 09:31, 28 February 2019
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	Consequently, MOPS intends to support aviation use and provides a series of features to guarantee integrity which, as expressed in EGNOS OS Service Definition Document,<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>''may result in degraded performance over what could be reached if implementing a tailored processing of EGNOS signals for OS,'' due to the stringent aviation requirements.		Consequently, MOPS intends to support aviation use and provides a series of features to guarantee integrity which, as expressed in EGNOS OS Service Definition Document,<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>''may result in degraded performance over what could be reached if implementing a tailored processing of EGNOS signals for OS,'' due to the stringent aviation requirements.

	[[File:Egnos os service area.png\|EGNOS OS Compliance Area (From EGNOS OS-SDD<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>\|200px\|thumb\|right]]		[[File:Egnos os service area.png\|EGNOS OS Compliance Area (From EGNOS OS-SDD)<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>\|200px\|thumb\|right]]

	Typically, all SBAS receivers designed to support OS shall:<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>		Typically, all SBAS receivers designed to support OS shall:<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>

Gema.Cueto at 09:31, 28 February 2019

2019-02-28T09:31:11Z

← Older revision		Revision as of 09:31, 28 February 2019
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	Consequently, MOPS intends to support aviation use and provides a series of features to guarantee integrity which, as expressed in EGNOS OS Service Definition Document,<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>''may result in degraded performance over what could be reached if implementing a tailored processing of EGNOS signals for OS,'' due to the stringent aviation requirements.		Consequently, MOPS intends to support aviation use and provides a series of features to guarantee integrity which, as expressed in EGNOS OS Service Definition Document,<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>''may result in degraded performance over what could be reached if implementing a tailored processing of EGNOS signals for OS,'' due to the stringent aviation requirements.

	[[File:~~EGNOS OS~~.png\|EGNOS OS Compliance Area (From EGNOS OS-SDD<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>\|200px\|thumb\|right]]		[[File:Egnos os service area.png\|EGNOS OS Compliance Area (From EGNOS OS-SDD<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>\|200px\|thumb\|right]]

	Typically, all SBAS receivers designed to support OS shall:<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>		Typically, all SBAS receivers designed to support OS shall:<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>

Gema.Cueto at 09:28, 28 February 2019

2019-02-28T09:28:02Z

← Older revision		Revision as of 09:28, 28 February 2019
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	\| '''EGNOS Signal Blockage''': For users in high latitudes geostationary satellites may fall below the visibility mask whereas in urban environments the EGNOS signal could be lost for a period of time.\|\| Performance degradation after a period of time: EGNOS will cope with temporary signal blockages but corrections will not be valid after a certain period.		\| '''EGNOS Signal Blockage''': For users in high latitudes geostationary satellites may fall below the visibility mask whereas in urban environments the EGNOS signal could be lost for a period of time.\|\| Performance degradation after a period of time: EGNOS will cope with temporary signal blockages but corrections will not be valid after a certain period.
	\|-		\|-
	\| '''Local Multipath''': Signals suffer reflections on nearby objects causing local errors on the measurements which cannot be corrected by the EGNOS system due to their local nature. \|\|Degraded position accuracy, ~~specially~~ on static or slowly moving users.		\| '''Local Multipath''': Signals suffer reflections on nearby objects causing local errors on the measurements which cannot be corrected by the EGNOS system due to their local nature. \|\|Degraded position accuracy, especially on static or slowly moving users.
	\|-		\|-
	\| '''Signal Interference''': Transmissions on adjacent frequency bands may interfere GNSS and EGNOS signals.\|\| It may result in accuracy degradation or total navigation loss depending on the intensity of the interference.		\| '''Signal Interference''': Transmissions on adjacent frequency bands may interfere GNSS and EGNOS signals.\|\| It may result in accuracy degradation or total navigation loss depending on the intensity of the interference.

Gema.Cueto at 09:18, 28 February 2019

2019-02-28T09:18:15Z

← Older revision		Revision as of 09:18, 28 February 2019
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	Consequently, MOPS intends to support aviation use and provides a series of features to guarantee integrity which, as expressed in EGNOS OS Service Definition Document,<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>''may result in degraded performance over what could be reached if implementing a tailored processing of EGNOS signals for OS,'' due to the stringent aviation requirements.		Consequently, MOPS intends to support aviation use and provides a series of features to guarantee integrity which, as expressed in EGNOS OS Service Definition Document,<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>''may result in degraded performance over what could be reached if implementing a tailored processing of EGNOS signals for OS,'' due to the stringent aviation requirements.

	[[File:EGNOS OS.png\|EGNOS OS Compliance Area\|200px\|thumb\|right]]		[[File:EGNOS OS.png\|EGNOS OS Compliance Area (From EGNOS OS-SDD<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>\|200px\|thumb\|right]]

	Typically, all SBAS receivers designed to support OS shall:<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>		Typically, all SBAS receivers designed to support OS shall:<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>

Gema.Cueto at 09:12, 28 February 2019

2019-02-28T09:12:41Z

← Older revision		Revision as of 09:12, 28 February 2019
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	The EGNOS Open Service is the first EGNOS service to become available and its main objective is to obtain enhanced positioning accuracy by correcting the error contributions that affect GPS signals, which are related to satellite clocks, satellite payload induced signal distortion, satellite position uncertainties and ionospheric delays whereas other effects, such as tropospheric delays, multipath or user receiver contributions, are local effects and cannot be corrected by an [[SBAS General Introduction\|SBAS]] system.		The EGNOS Open Service is the first EGNOS service to become available and its main objective is to obtain enhanced positioning accuracy by correcting the error contributions that affect GPS signals, which are related to satellite clocks, satellite payload induced signal distortion, satellite position uncertainties and ionospheric delays whereas other effects, such as tropospheric delays, multipath or user receiver contributions, are local effects and cannot be corrected by an [[SBAS General Introduction\|SBAS]] system.

	The EGNOS OS Definition Document states that the service is available to any user equipped with a SBAS enabled.<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>		The EGNOS OS Definition Document states that the service is ''available to any user equipped with a SBAS enabled receiver.''<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>
	The OS was declared available on the 1st October 2009<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref> and this EGNOS service is intended to be provided for a minimum period of 20 years with a 6 years in advance notice in case of significant changes in the Services provided.		The OS was declared available on the 1st October 2009<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref> and this EGNOS service is intended to be provided for a minimum period of 20 years with a 6 years in advance notice in case of significant changes in the Services provided.

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	[[EGNOS Performances\|EGNOS performances]] are considered from a user perspective and they are expressed in terms of availability, continuity, integrity and accuracy. The minimum requirements for these terms are defined by SBAS standards which were conceived for civil aviation applications. These standards are called SBAS Minimum Operational Performance Standards and are published by [http://www.rtca.org/ RTCA] under the reference DO-229.<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref> <ref name=" RTCA MOPS DO 229">Minimum Operational Performance Standards for Global Positioning System/Wide Area Augmentation System Airbone Equipment (RTCA MOPS DO-229)</ref>		[[EGNOS Performances\|EGNOS performances]] are considered from a user perspective and they are expressed in terms of availability, continuity, integrity and accuracy. The minimum requirements for these terms are defined by SBAS standards which were conceived for civil aviation applications. These standards are called SBAS Minimum Operational Performance Standards and are published by [http://www.rtca.org/ RTCA] under the reference DO-229.<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref> <ref name=" RTCA MOPS DO 229">Minimum Operational Performance Standards for Global Positioning System/Wide Area Augmentation System Airbone Equipment (RTCA MOPS DO-229)</ref>

	Consequently, MOPS intends to support aviation use and provides a series of features to guarantee integrity which, as expressed in EGNOS Service Definition Document,<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>may result in degraded performance over what could be reached if implementing a tailored processing of EGNOS signals for OS, due to the stringent aviation requirements.		Consequently, MOPS intends to support aviation use and provides a series of features to guarantee integrity which, as expressed in EGNOS OS Service Definition Document,<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>''may result in degraded performance over what could be reached if implementing a tailored processing of EGNOS signals for OS,'' due to the stringent aviation requirements.

	[[File:EGNOS OS.png\|EGNOS OS Compliance Area\|200px\|thumb\|right]]		[[File:EGNOS OS.png\|EGNOS OS Compliance Area\|200px\|thumb\|right]]

Gema.Cueto at 14:55, 25 February 2019

2019-02-25T14:55:24Z

← Older revision		Revision as of 14:55, 25 February 2019
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	*A clear sky environment is assumed with no obstacles masking satellite visibility greater than 5° above the local horizontal plane.		*A clear sky environment is assumed with no obstacles masking satellite visibility greater than 5° above the local horizontal plane.

	The minimum level of performance against which the system has been designed, as well as data of actual performance, is provided in the table and map below.<ref name="EGNOS Open Service specifications">This information is solely presented for transparency in order to enable the user to make an informed decision regarding EGNOS OS use and, thus, actual EGNOS OS performance may differ in the future.		The minimum level of performance against which the system has been designed, as well as data of actual performance, is provided in the table and map below.<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>
			This information is solely presented for transparency in order to enable the user to make an informed decision regarding EGNOS OS use and, thus, actual EGNOS OS performance may differ in the future.

	{\| class="wikitable"		{\| class="wikitable"
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	==Limitations==		==Limitations==
	The minimum performance levels stated in Section [[#Performance Requirements\| Performance Requirements]] are fulfilled in the vast majority of cases and service availability is also provided. However, there might be some situations where non nominal navigation performances are obtained.		The minimum performance levels stated in Section [[#Performance Requirements\| Performance Requirements]] are fulfilled in the vast majority of cases and service availability is also provided. However, there might be some situations where non nominal navigation performances are obtained.
	The most common causes of abnormal EGNOS behavior and their impact on performances are listed in the following table:<ref name="EGNOS Open Service specifications">		The most common causes of abnormal EGNOS behavior and their impact on performances are listed in the following table:<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>


	{\| class="wikitable"		{\| class="wikitable"
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	==Credits==		==Credits==
	The information provided in this article has been compiled by GMV. In some cases, tables and paragraphs have been extracted from the indicated references, in particular from the ''EGNOS OS Definition Document.''<ref name="EGNOS Open Service specifications">		The information provided in this article has been compiled by GMV. In some cases, tables and paragraphs have been extracted from the indicated references, in particular from the ''EGNOS OS Definition Document.''<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>
	<references group="footnotes"/>		<references group="footnotes"/>

Gema.Cueto at 14:54, 25 February 2019

2019-02-25T14:54:16Z

← Older revision		Revision as of 14:54, 25 February 2019
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	==Performance requirements==		==Performance requirements==
	[[EGNOS Performances\|EGNOS performances]] are considered from a user perspective and they are expressed in terms of availability, continuity, integrity and accuracy. The minimum requirements for these terms are defined by SBAS standards which were conceived for civil aviation applications. These standards are called SBAS Minimum Operational Performance Standards and are published by [http://www.rtca.org/ RTCA] under the reference DO-229.<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>		[[EGNOS Performances\|EGNOS performances]] are considered from a user perspective and they are expressed in terms of availability, continuity, integrity and accuracy. The minimum requirements for these terms are defined by SBAS standards which were conceived for civil aviation applications. These standards are called SBAS Minimum Operational Performance Standards and are published by [http://www.rtca.org/ RTCA] under the reference DO-229.<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref> <ref name=" RTCA MOPS DO 229">Minimum Operational Performance Standards for Global Positioning System/Wide Area Augmentation System Airbone Equipment (RTCA MOPS DO-229)</ref>
	<ref name=" RTCA MOPS DO 229">Minimum Operational Performance Standards for Global Positioning System/Wide Area Augmentation System Airbone Equipment (RTCA MOPS DO-229)</ref>

	Consequently, MOPS intends to support aviation use and provides a series of features to guarantee integrity which, as expressed in EGNOS Service Definition Document,<ref name="EGNOS Open Service specifications"> may result in degraded performance over what could be reached if implementing a tailored processing of EGNOS signals for OS, due to the stringent aviation requirements.		Consequently, MOPS intends to support aviation use and provides a series of features to guarantee integrity which, as expressed in EGNOS Service Definition Document,<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>may result in degraded performance over what could be reached if implementing a tailored processing of EGNOS signals for OS, due to the stringent aviation requirements.

	[[File:EGNOS OS.png\|EGNOS OS Compliance Area\|200px\|thumb\|right]]		[[File:EGNOS OS.png\|EGNOS OS Compliance Area\|200px\|thumb\|right]]

	Typically, all SBAS receivers designed to support OS shall:<ref name="EGNOS Open Service specifications">		Typically, all SBAS receivers designed to support OS shall:<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>
	*''Use the Geostationary satellite ranging function if available (broadcast through message types 9 and 17, this function is currently not supported by EGNOS).		*''Use the Geostationary satellite ranging function if available (broadcast through message types 9 and 17, this function is currently not supported by EGNOS).
	*''Decode and apply satellite clock corrections (broadcast through message types 2-5 and corresponding to satellites selected by message type 1).''		*''Decode and apply satellite clock corrections (broadcast through message types 2-5 and corresponding to satellites selected by message type 1).''

Gema.Cueto at 14:50, 25 February 2019

2019-02-25T14:50:33Z

← Older revision		Revision as of 14:50, 25 February 2019
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	The EGNOS OS Definition Document states that the service is available to any user equipped with a SBAS enabled.<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>		The EGNOS OS Definition Document states that the service is available to any user equipped with a SBAS enabled.<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>
	The OS was declared available on the 1st October 2009<ref name="EGNOS Open Service specifications"> and this EGNOS service is intended to be provided for a minimum period of 20 years with a 6 years in advance notice in case of significant changes in the Services provided.		The OS was declared available on the 1st October 2009<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref> and this EGNOS service is intended to be provided for a minimum period of 20 years with a 6 years in advance notice in case of significant changes in the Services provided.

	==Performance requirements==		==Performance requirements==
	[[EGNOS Performances\|EGNOS performances]] are considered from a user perspective and they are expressed in terms of availability, continuity, integrity and accuracy. The minimum requirements for these terms are defined by SBAS standards which were conceived for civil aviation applications. These standards are called SBAS Minimum Operational Performance Standards and are published by [http://www.rtca.org/ RTCA] under the reference DO-229.<ref name="EGNOS Open Service specifications"> <ref name=" RTCA MOPS DO 229">Minimum Operational Performance Standards for Global Positioning System/Wide Area Augmentation System Airbone Equipment (RTCA MOPS DO-229)</ref>		[[EGNOS Performances\|EGNOS performances]] are considered from a user perspective and they are expressed in terms of availability, continuity, integrity and accuracy. The minimum requirements for these terms are defined by SBAS standards which were conceived for civil aviation applications. These standards are called SBAS Minimum Operational Performance Standards and are published by [http://www.rtca.org/ RTCA] under the reference DO-229.<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/system/files/galileo_documents/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>
			<ref name=" RTCA MOPS DO 229">Minimum Operational Performance Standards for Global Positioning System/Wide Area Augmentation System Airbone Equipment (RTCA MOPS DO-229)</ref>

	Consequently, MOPS intends to support aviation use and provides a series of features to guarantee integrity which, as expressed in EGNOS Service Definition Document,<ref name="EGNOS Open Service specifications"> may result in degraded performance over what could be reached if implementing a tailored processing of EGNOS signals for OS, due to the stringent aviation requirements.		Consequently, MOPS intends to support aviation use and provides a series of features to guarantee integrity which, as expressed in EGNOS Service Definition Document,<ref name="EGNOS Open Service specifications"> may result in degraded performance over what could be reached if implementing a tailored processing of EGNOS signals for OS, due to the stringent aviation requirements.

← Older revision		Revision as of 14:04, 18 March 2020
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	[[File:egnos_3.png\|The EGNOS Open Service was declared available in October 2009\|200px\|thumb\|right]]		[[File:egnos_3.png\|The EGNOS Open Service was declared available in October 2009\|200px\|thumb\|right]]

	The EGNOS Open Service is fully operational and the signal-in-space is available since October 2009 for any user equipped with an EGNOS enabled receiver without any further requirement. Details about the EGNOS-enabled receiver design specifications can be found in EGNOS Open Service - Service Definition document.<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/~~system~~/files/~~galileo_documents~~/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>		The EGNOS Open Service is fully operational and the signal-in-space is available since October 2009 for any user equipped with an EGNOS enabled receiver without any further requirement. Details about the EGNOS-enabled receiver design specifications can be found in EGNOS Open Service - Service Definition document.<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/sites/default/files/sites/all/files/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>

	This service is provided through the GEO satellites within the EGNOS service area and it improves GPS performances in Europe. However, EGNOS OS shall only be used for non-safety critical purposes, i.e. those where degraded performances could not provoke direct or indirect personal damage. Besides, no service guarantee or liability is provided by the EGNOS Service provider,<ref name="ESSP Web Site">[http://www.essp-sas.eu/ ESSP Web Site]</ref> the European Union, the European GNSS Agency (GSA)<ref name="GSA Web Site">[https://www.gsa.europa.eu/ GSA Website]</ref> or the European Space Agency (ESA).<ref name="ESA EGNOS Portal">[http://www.esa.int/esaNA/egnos.html European Space Agency EGNOS Portal]</ref>		This service is provided through the GEO satellites within the EGNOS service area and it improves GPS performances in Europe. However, EGNOS OS shall only be used for non-safety critical purposes, i.e. those where degraded performances could not provoke direct or indirect personal damage. Besides, no service guarantee or liability is provided by the EGNOS Service provider,<ref name="ESSP Web Site">[http://www.essp-sas.eu/ ESSP Web Site]</ref> the European Union, the European GNSS Agency (GSA)<ref name="GSA Web Site">[https://www.gsa.europa.eu/ GSA Website]</ref> or the European Space Agency (ESA).<ref name="ESA EGNOS Portal">[http://www.esa.int/esaNA/egnos.html European Space Agency EGNOS Portal]</ref>
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	The EGNOS Open Service is the first EGNOS service to become available and its main objective is to obtain enhanced positioning accuracy by correcting the error contributions that affect GPS signals, which are related to satellite clocks, satellite payload induced signal distortion, satellite position uncertainties and ionospheric delays whereas other effects, such as tropospheric delays, multipath or user receiver contributions, are local effects and cannot be corrected by an [[SBAS General Introduction\|SBAS]] system.		The EGNOS Open Service is the first EGNOS service to become available and its main objective is to obtain enhanced positioning accuracy by correcting the error contributions that affect GPS signals, which are related to satellite clocks, satellite payload induced signal distortion, satellite position uncertainties and ionospheric delays whereas other effects, such as tropospheric delays, multipath or user receiver contributions, are local effects and cannot be corrected by an [[SBAS General Introduction\|SBAS]] system.

	The EGNOS OS Definition Document states that the service is ''available to any user equipped with a SBAS enabled receiver.''<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/~~system~~/files/~~galileo_documents~~/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>		The EGNOS OS Definition Document states that the service is ''available to any user equipped with a SBAS enabled receiver.''<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/sites/default/files/sites/all/files/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>
	The OS was declared available on the 1st October 2009<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/~~system~~/files/~~galileo_documents~~/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref> and this EGNOS service is intended to be provided for a minimum period of 20 years with a 6 years in advance notice in case of significant changes in the Services provided.		The OS was declared available on the 1st October 2009<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/sites/default/files/sites/all/files/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref> and this EGNOS service is intended to be provided for a minimum period of 20 years with a 6 years in advance notice in case of significant changes in the Services provided.

	==Performance requirements==		==Performance requirements==
	[[EGNOS Performances\|EGNOS performances]] are considered from a user perspective and they are expressed in terms of availability, continuity, integrity and accuracy. The minimum requirements for these terms are defined by SBAS standards which were conceived for civil aviation applications. These standards are called SBAS Minimum Operational Performance Standards and are published by [http://www.rtca.org/ RTCA] under the reference DO-229.<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/~~system~~/files/~~galileo_documents~~/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref> <ref name=" RTCA MOPS DO 229">Minimum Operational Performance Standards for Global Positioning System/Wide Area Augmentation System Airbone Equipment (RTCA MOPS DO-229)</ref>		[[EGNOS Performances\|EGNOS performances]] are considered from a user perspective and they are expressed in terms of availability, continuity, integrity and accuracy. The minimum requirements for these terms are defined by SBAS standards which were conceived for civil aviation applications. These standards are called SBAS Minimum Operational Performance Standards and are published by [http://www.rtca.org/ RTCA] under the reference DO-229.<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/sites/default/files/sites/all/files/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref> <ref name=" RTCA MOPS DO 229">Minimum Operational Performance Standards for Global Positioning System/Wide Area Augmentation System Airbone Equipment (RTCA MOPS DO-229)</ref>

	Consequently, MOPS intends to support aviation use and provides a series of features to guarantee integrity which, as expressed in EGNOS OS Service Definition Document,<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/~~system~~/files/~~galileo_documents~~/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>''may result in degraded performance over what could be reached if implementing a tailored processing of EGNOS signals for OS,'' due to the stringent aviation requirements.		Consequently, MOPS intends to support aviation use and provides a series of features to guarantee integrity which, as expressed in EGNOS OS Service Definition Document,<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/sites/default/files/sites/all/files/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>''may result in degraded performance over what could be reached if implementing a tailored processing of EGNOS signals for OS,'' due to the stringent aviation requirements.

	[[File:EGNOS OS.png\|EGNOS OS Compliance Area (From EGNOS OS-SDD)<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/~~system~~/files/~~galileo_documents~~/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>\|200px\|thumb\|right]]		[[File:EGNOS OS.png\|EGNOS OS Compliance Area (From EGNOS OS-SDD)<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/sites/default/files/sites/all/files/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>\|200px\|thumb\|right]]

	Typically, all SBAS receivers designed to support OS shall:<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/~~system~~/files/~~galileo_documents~~/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>		Typically, all SBAS receivers designed to support OS shall:<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/sites/default/files/sites/all/files/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>
	*''Use the Geostationary satellite ranging function if available (broadcast through message types 9 and 17, this function is currently not supported by EGNOS).		*''Use the Geostationary satellite ranging function if available (broadcast through message types 9 and 17, this function is currently not supported by EGNOS).
	*''Decode and apply satellite clock corrections (broadcast through message types 2-5 and corresponding to satellites selected by message type 1).''		*''Decode and apply satellite clock corrections (broadcast through message types 2-5 and corresponding to satellites selected by message type 1).''
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	*A clear sky environment is assumed with no obstacles masking satellite visibility greater than 5° above the local horizontal plane.		*A clear sky environment is assumed with no obstacles masking satellite visibility greater than 5° above the local horizontal plane.

	The minimum level of performance against which the system has been designed, as well as data of actual performance, is provided in the table and map below.<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/~~system~~/files/~~galileo_documents~~/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>		The minimum level of performance against which the system has been designed, as well as data of actual performance, is provided in the table and map below.<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/sites/default/files/sites/all/files/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>
	This information is solely presented for transparency in order to enable the user to make an informed decision regarding EGNOS OS use and, thus, actual EGNOS OS performance may differ in the future.		This information is solely presented for transparency in order to enable the user to make an informed decision regarding EGNOS OS use and, thus, actual EGNOS OS performance may differ in the future.

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	==Limitations==		==Limitations==
	The minimum performance levels stated in Section [[#Performance Requirements\| Performance Requirements]] are fulfilled in the vast majority of cases and service availability is also provided. However, there might be some situations where non nominal navigation performances are obtained.		The minimum performance levels stated in Section [[#Performance Requirements\| Performance Requirements]] are fulfilled in the vast majority of cases and service availability is also provided. However, there might be some situations where non nominal navigation performances are obtained.
	The most common causes of abnormal EGNOS behavior and their impact on performances are listed in the following table:<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/~~system~~/files/~~galileo_documents~~/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>		The most common causes of abnormal EGNOS behavior and their impact on performances are listed in the following table:<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/sites/default/files/sites/all/files/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>


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	==Credits==		==Credits==
	The information provided in this article has been compiled by GMV. In some cases, tables and paragraphs have been extracted from the indicated references, in particular from the ''EGNOS OS Definition Document.''<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/~~system~~/files/~~galileo_documents~~/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>		The information provided in this article has been compiled by GMV. In some cases, tables and paragraphs have been extracted from the indicated references, in particular from the ''EGNOS OS Definition Document.''<ref name="EGNOS Open Service specifications">[https://www.gsc-europa.eu/sites/default/files/sites/all/files/egnos_os_sdd_in_force.pdf Applicable EGNOS Open Service – Service Definition Document (EGNOS OS-SDD)]</ref>
	<references group="footnotes"/>		<references group="footnotes"/>