GNSS Augmentation - Revision history

Claudia.Prajanu at 08:13, 26 July 2018

2018-07-26T08:13:12Z

← Older revision		Revision as of 08:13, 26 July 2018
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	===Wide Area RTK (WARTK)===		===Wide Area RTK (WARTK)===
	The [[Wide Area RTK (WARTK)\|Wide Area RTK (WARTK)]] technique was introduced in the late 1990s to overcome the RTK need of a very dense reference stations network. The WARTK concept provides accurate ionospheric corrections that are used as additional information and allows increasing the RTK service area. In this way, it just needs reference stations separated by about 500–900 kilometres<ref>[http://~~www.~~insidegnss.com/~~node~~/~~1917~~ Wide-Area RTK], InsideGNSS, March/April 2010</ref>. WARTK is a relatively new concept with still no operational system in place.		The [[Wide Area RTK (WARTK)\|Wide Area RTK (WARTK)]] technique was introduced in the late 1990s to overcome the RTK need of a very dense reference stations network. The WARTK concept provides accurate ionospheric corrections that are used as additional information and allows increasing the RTK service area. In this way, it just needs reference stations separated by about 500–900 kilometres<ref>[http://insidegnss.com/wide-area-rtk/ Wide-Area RTK], InsideGNSS, March/April 2010</ref>. WARTK is a relatively new concept with still no operational system in place.

	===Precise Point Positioning===		===Precise Point Positioning===

Filipe.Pelica: Included editor logo.

2014-09-18T15:24:44Z

Included editor logo.

← Older revision		Revision as of 15:24, 18 September 2014
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	\|Level=Basic		\|Level=Basic
	\|YearOfPublication=2011		\|YearOfPublication=2011
			\|Logo=GMV
	\|Title={{PAGENAME}}		\|Title={{PAGENAME}}
	}}		}}

Carlos.Lopez at 11:32, 23 February 2012

2012-02-23T11:32:56Z

← Older revision		Revision as of 11:32, 23 February 2012
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	{{Article Infobox2		{{Article Infobox2
	\|Category=Fundamentals		\|Category=Fundamentals
	\|~~Authors~~=GMV		\|Editors=GMV
	\|Level=Basic		\|Level=Basic
	\|YearOfPublication=2011		\|YearOfPublication=2011
	~~\|Logo=GMV~~
	\|Title={{PAGENAME}}		\|Title={{PAGENAME}}
	}}		}}

Angel.Gavin: /* Ground-based Augmentation Systems */

2011-11-11T07:30:04Z

Ground-based Augmentation Systems

← Older revision		Revision as of 07:30, 11 November 2011
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	[[Ground-Based Augmentation System (GBAS)\|Ground-Based Augmentation System (GBAS)]] aim at enhancing GNSS service levels for aviation during approach, landing and departure phases, as well as for surface operations. They have a local coverage (e.g. the surroundings of an airport) with the primary objective of meeting aviation requirements for the aforementioned operations and phases, in terms of accuracy, integrity and safety. Actually, whereas the main goal of GBAS is to provide [[Integrity\|integrity]] assurance, it also increases the [[Accuracy\|accuracy]] with position errors below 1 m (1 sigma).		[[Ground-Based Augmentation System (GBAS)\|Ground-Based Augmentation System (GBAS)]] aim at enhancing GNSS service levels for aviation during approach, landing and departure phases, as well as for surface operations. They have a local coverage (e.g. the surroundings of an airport) with the primary objective of meeting aviation requirements for the aforementioned operations and phases, in terms of accuracy, integrity and safety. Actually, whereas the main goal of GBAS is to provide [[Integrity\|integrity]] assurance, it also increases the [[Accuracy\|accuracy]] with position errors below 1 m (1 sigma).

	The ground infrastructure includes two or more [[:Category:Receivers\|GNSS receivers]] which collect pseudoranges for all the primary GNSS satellites in view and computes and broadcasts differential corrections and [[Integrity\|integrity]]-related information for them based on its own surveyed position. These differential corrections are transmitted from the ground system via a [[Wikipedia:Very high frequency\|Very High Frequency (VHF)]] Data Broadcast (VDB). The broadcast information includes pseudorange corrections, [[Integrity\|integrity]] parameters and various locally relevant data such as Final Approach Segment (FAS) data, referenced to the [[Wikipedia:World Geodetic System\|World Geodetic System (WGS-84)]].		The ground infrastructure includes two or more [[:Category:Receivers\|GNSS receivers]] which collect pseudoranges for all the primary GNSS satellites in view and computes and broadcasts differential corrections and [[Integrity\|integrity]]-related information for them based on its own surveyed position. These differential corrections are transmitted from the ground system via a [[Wikipedia:Very high frequency\|Very High Frequency (VHF)]] Data Broadcast (VDB). The broadcast information includes pseudorange corrections, [[Integrity\|integrity]] parameters and various locally relevant data such as Final Approach Segment (FAS) data, referenced to the [[Wikipedia:World Geodetic System\|World Geodetic System (WGS-84)]]. Any aircraft (within the area of coverage of the ground station) may use those corrections to compute their own measurements to compute a (differentially corrected) position, which at the same time is used to generate navigation guidance signals.

	~~The~~ aircraft within the area of coverage of the ground station may use ~~the broadcast~~ corrections to compute their own measurements ~~in line with the differential principle. The~~ differentially corrected position is used to generate navigation guidance signals.

	GBAS and SBAS are both GNSS safety critical systems for civil aviation which share similar principles. The main difference comes from the fact that GBAS provides local corrections to the satellite pseudoranges using just ground infrastructure in the vicinity of the served airport, whilst SBAS broadcasts corrections to the different components of the pseudorange error valid for an area as big as a continent; the price to pay is that the SBAS infrastructure needs tens of sensor distributed in the augmented area and two or more GEO satellites to broadcast the information.		GBAS and SBAS are both GNSS safety critical systems for civil aviation which share similar principles. The main difference comes from the fact that GBAS provides local corrections to the satellite pseudoranges using just ground infrastructure in the vicinity of the served airport, whilst SBAS broadcasts corrections to the different components of the pseudorange error valid for an area as big as a continent; the price to pay is that the SBAS infrastructure needs tens of sensor distributed in the augmented area and two or more GEO satellites to broadcast the information.

Angel.Gavin: /* Ground-based Augmentation Systems */

2011-11-08T16:37:41Z

Ground-based Augmentation Systems

← Older revision		Revision as of 16:37, 8 November 2011
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	==Ground-based Augmentation Systems==		==Ground-based Augmentation Systems==
	[[Ground-Based Augmentation System (GBAS)\|Ground-Based Augmentation System (GBAS)]] ~~are GNSS augmentation systems aiming~~ at enhancing GNSS service levels for aviation during approach, landing and departure phases, as well as for surface operations. They have a local coverage (e.g. the surroundings of an airport) with the primary objective of meeting aviation requirements for the aforementioned operations and phases, in terms of accuracy, integrity and safety. Actually, whereas the main goal of GBAS is to provide [[Integrity\|integrity]] assurance, it also increases the [[Accuracy\|accuracy]] with position errors below 1 m (1 sigma).		[[Ground-Based Augmentation System (GBAS)\|Ground-Based Augmentation System (GBAS)]] aim at enhancing GNSS service levels for aviation during approach, landing and departure phases, as well as for surface operations. They have a local coverage (e.g. the surroundings of an airport) with the primary objective of meeting aviation requirements for the aforementioned operations and phases, in terms of accuracy, integrity and safety. Actually, whereas the main goal of GBAS is to provide [[Integrity\|integrity]] assurance, it also increases the [[Accuracy\|accuracy]] with position errors below 1 m (1 sigma).

	The ground infrastructure includes two or more [[:Category:Receivers\|GNSS receivers]] which collect pseudoranges for all the primary GNSS satellites in view and computes and broadcasts differential corrections and [[Integrity\|integrity]]-related information for them based on its own surveyed position. These differential corrections are transmitted from the ground system via a [[Wikipedia:Very high frequency\|Very High Frequency (VHF)]] Data Broadcast (VDB). The broadcast information includes pseudorange corrections, [[Integrity\|integrity]] parameters and various locally relevant data such as Final Approach Segment (FAS) data, referenced to the [[Wikipedia:World Geodetic System\|World Geodetic System (WGS-84)]].		The ground infrastructure includes two or more [[:Category:Receivers\|GNSS receivers]] which collect pseudoranges for all the primary GNSS satellites in view and computes and broadcasts differential corrections and [[Integrity\|integrity]]-related information for them based on its own surveyed position. These differential corrections are transmitted from the ground system via a [[Wikipedia:Very high frequency\|Very High Frequency (VHF)]] Data Broadcast (VDB). The broadcast information includes pseudorange corrections, [[Integrity\|integrity]] parameters and various locally relevant data such as Final Approach Segment (FAS) data, referenced to the [[Wikipedia:World Geodetic System\|World Geodetic System (WGS-84)]].

Angel.Gavin: /* Ground-based Augmentation Systems */

2011-11-08T16:37:12Z

Ground-based Augmentation Systems

← Older revision		Revision as of 16:37, 8 November 2011
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	==Ground-based Augmentation Systems==		==Ground-based Augmentation Systems==
	A [[Ground-Based Augmentation System (GBAS)\|Ground-Based Augmentation System (GBAS)]] is a ~~civil-aviation safety-critical system that supports~~ local ~~augmentation – at~~ airport ~~level – of~~ the primary ~~GNSS constellation(s) by providing enhanced levels~~ of ~~service that support all~~ phases of ~~approach, landing~~, ~~departure~~ and ~~surface operations~~. ~~While~~ the main goal of GBAS is to provide [[Integrity\|integrity]] assurance, it also increases the [[Accuracy\|accuracy]] with position errors below 1 m (1 sigma).		[[Ground-Based Augmentation System (GBAS)\|Ground-Based Augmentation System (GBAS)]] are GNSS augmentation systems aiming at enhancing GNSS service levels for aviation during approach, landing and departure phases, as well as for surface operations. They have a local coverage (e.g. the surroundings of an airport) with the primary objective of meeting aviation requirements for the aforementioned operations and phases, in terms of accuracy, integrity and safety. Actually, whereas the main goal of GBAS is to provide [[Integrity\|integrity]] assurance, it also increases the [[Accuracy\|accuracy]] with position errors below 1 m (1 sigma).

	The ground infrastructure includes two or more [[:Category:Receivers\|GNSS receivers]] which collect pseudoranges for all the primary GNSS satellites in view and computes and broadcasts differential corrections and [[Integrity\|integrity]]-related information for them based on its own surveyed position. These differential corrections are transmitted from the ground system via a [[Wikipedia:Very high frequency\|Very High Frequency (VHF)]] Data Broadcast (VDB). The broadcast information includes pseudorange corrections, [[Integrity\|integrity]] parameters and various locally relevant data such as Final Approach Segment (FAS) data, referenced to the [[Wikipedia:World Geodetic System\|World Geodetic System (WGS-84)]].		The ground infrastructure includes two or more [[:Category:Receivers\|GNSS receivers]] which collect pseudoranges for all the primary GNSS satellites in view and computes and broadcasts differential corrections and [[Integrity\|integrity]]-related information for them based on its own surveyed position. These differential corrections are transmitted from the ground system via a [[Wikipedia:Very high frequency\|Very High Frequency (VHF)]] Data Broadcast (VDB). The broadcast information includes pseudorange corrections, [[Integrity\|integrity]] parameters and various locally relevant data such as Final Approach Segment (FAS) data, referenced to the [[Wikipedia:World Geodetic System\|World Geodetic System (WGS-84)]].

Rui.Pereira at 15:45, 8 November 2011

2011-11-08T15:45:36Z

← Older revision		Revision as of 15:45, 8 November 2011
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	{{Article Infobox2		{{Article Infobox2
	\|Category=Fundamentals		\|Category=Fundamentals
	~~\|Title={{PAGENAME}}~~
	\|Authors=GMV		\|Authors=GMV
	\|Level=Basic		\|Level=Basic
	\|YearOfPublication=2011		\|YearOfPublication=2011
	\|Logo=GMV		\|Logo=GMV
			\|Title={{PAGENAME}}
	}}		}}
	Augmentation of a global navigation satellite system (GNSS) is a method of improving – “augmenting” - the navigation system's [[GNSS Performances\|performances]], such as [[Integrity\|integrity]], [[Continuity\|continuity]], [[Accuracy\|accuracy]] or [[Availability\|availability]] thanks to the use of external information to the GNSS into the user position solution<ref name="GNSS Aug">[[Wikipedia:GNSS augmentation]]</ref><ref name="Kaplan">E.D. Kaplan, C.J. Hegarty, ''Understanding GPS Principles and Applications”, 2nd Ed., Artch House, ISBN 1-58053-894-0, 2006.</ref>.		Augmentation of a global navigation satellite system (GNSS) is a method of improving – “augmenting” - the navigation system's [[GNSS Performances\|performances]], such as [[Integrity\|integrity]], [[Continuity\|continuity]], [[Accuracy\|accuracy]] or [[Availability\|availability]] thanks to the use of external information to the GNSS into the user position solution<ref name="GNSS Aug">[[Wikipedia:GNSS augmentation]]</ref><ref name="Kaplan">E.D. Kaplan, C.J. Hegarty, ''Understanding GPS Principles and Applications”, 2nd Ed., Artch House, ISBN 1-58053-894-0, 2006.</ref>.
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	==Differential GNSS==		==Differential GNSS==
	[[~~Work in Progress:~~Differential GNSS\|Differential GNSS]] is an enhancement to primary GNSS constellation(s) information by the use of a network of ground-based reference stations which enable the broadcasting of differential information to the user – also named rover – to improve the accuracy of his position – the integrity is not assured.		[[Differential GNSS\|Differential GNSS]] is an enhancement to primary GNSS constellation(s) information by the use of a network of ground-based reference stations which enable the broadcasting of differential information to the user – also named rover – to improve the accuracy of his position – the integrity is not assured.
	There are several differential GNSS techniques, such as the [[DGNSS Fundamentals\|classical DGNSS]] (or DGPS), the [[Real Time Kinematics\|Real Time Kinematics (RTK)]] and the [[Wide Area RTK (WARTK)\|Wide Area RTK (WARTK)]].		There are several differential GNSS techniques, such as the [[DGNSS Fundamentals\|classical DGNSS]] (or DGPS), the [[Real Time Kinematics\|Real Time Kinematics (RTK)]] and the [[Wide Area RTK (WARTK)\|Wide Area RTK (WARTK)]].

Jose.Caro: /* Introduction */

2011-06-27T14:08:26Z

Introduction

← Older revision		Revision as of 14:08, 27 June 2011
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	==Introduction==		==Introduction==
	Based on its main feature, GNSS augmentation systems can be classified as those providing [[Integrity\|integrity]] information to the primary GNSS satellites constellation(s) and those improving the [[Accuracy\|accuracy]] of the user solution with respect to the only use of the primary GNSS constellation(s). A further classification may be done according to an additional relevant feature, which for the former relates on whether the augmentation information comes from satellites (satellite-based augmentation system) or from ground (ground-based augmentation system) and for the latter on whether the accuracy improvements use a dense network of reference stations ([[Differential GNSS]], [[Real Time Kinematics]] - RTK - or [[Wide Area RTK]]) or just a few stations ([[Precise Point Positioning]] - PPP) for the computation of the augmentation information.		Based on its main feature, GNSS augmentation systems can be classified as those providing [[Integrity\|integrity]] information to the primary GNSS satellites constellation(s) and those improving the [[Accuracy\|accuracy]] of the user solution with respect to the only use of the primary GNSS constellation(s). A further classification may be done according to an additional relevant feature, which for the former relates on whether the augmentation information comes from satellites (satellite-based augmentation system) or from ground (ground-based augmentation system) and for the latter on whether the accuracy improvements use a dense network of reference stations ([[Differential GNSS]], [[Real Time Kinematics]] - RTK - or [[Wide Area RTK (WARTK)]]) or just a few stations ([[Precise Point Positioning]] - PPP) for the computation of the augmentation information.

	[[File:GNSS Augmentation Comparison.png‎‎\|none\|thumb\|400px\|alt=Accuracy Performances for GNSS\|Accuracy Performances for GNSS and GNSS Augmentation Techniques]]		[[File:GNSS Augmentation Comparison.png‎‎\|none\|thumb\|400px\|alt=Accuracy Performances for GNSS\|Accuracy Performances for GNSS and GNSS Augmentation Techniques]]

Jose.Caro: /* Differential GNSS */

2011-06-27T14:07:51Z

Differential GNSS

← Older revision		Revision as of 14:07, 27 June 2011
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	==Differential GNSS==		==Differential GNSS==
	[[Work in Progress:Differential GNSS\|Differential GNSS]] is an enhancement to primary GNSS constellation(s) information by the use of a network of ground-based reference stations which enable the broadcasting of differential information to the user – also named rover – to improve the accuracy of his position – the integrity is not assured.		[[Work in Progress:Differential GNSS\|Differential GNSS]] is an enhancement to primary GNSS constellation(s) information by the use of a network of ground-based reference stations which enable the broadcasting of differential information to the user – also named rover – to improve the accuracy of his position – the integrity is not assured.
	There are several differential GNSS techniques, such as the [[DGNSS Fundamentals\|classical DGNSS]] (or DGPS), the [[Real Time Kinematics\|Real Time Kinematics (RTK)]] and the [[Wide Area RTK\|Wide Area RTK (WARTK)]].		There are several differential GNSS techniques, such as the [[DGNSS Fundamentals\|classical DGNSS]] (or DGPS), the [[Real Time Kinematics\|Real Time Kinematics (RTK)]] and the [[Wide Area RTK (WARTK)\|Wide Area RTK (WARTK)]].

	===Classical DGNSS===		===Classical DGNSS===

Jose.Caro: /* Wide Area RTK (WARTK) */

2011-06-27T14:07:26Z

Wide Area RTK (WARTK)

← Older revision		Revision as of 14:07, 27 June 2011
Line 47:		Line 47:

	===Wide Area RTK (WARTK)===		===Wide Area RTK (WARTK)===
	The [[Wide Area RTK\|Wide Area RTK (WARTK)]] technique was introduced in the late 1990s to overcome the RTK need of a very dense reference stations network. The WARTK concept provides accurate ionospheric corrections that are used as additional information and allows increasing the RTK service area. In this way, it just needs reference stations separated by about 500–900 kilometres<ref>[http://www.insidegnss.com/node/1917 Wide-Area RTK], InsideGNSS, March/April 2010</ref>. WARTK is a relatively new concept with still no operational system in place.		The [[Wide Area RTK (WARTK)\|Wide Area RTK (WARTK)]] technique was introduced in the late 1990s to overcome the RTK need of a very dense reference stations network. The WARTK concept provides accurate ionospheric corrections that are used as additional information and allows increasing the RTK service area. In this way, it just needs reference stations separated by about 500–900 kilometres<ref>[http://www.insidegnss.com/node/1917 Wide-Area RTK], InsideGNSS, March/April 2010</ref>. WARTK is a relatively new concept with still no operational system in place.

	===Precise Point Positioning===		===Precise Point Positioning===