GLONASS Performances - Revision history

Claudia.Prajanu at 17:21, 22 June 2018

2018-06-22T17:21:17Z

← Older revision		Revision as of 17:21, 22 June 2018
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	Equivalent to the Standard Positioning Service (SPS) and the Precise Positioning Service (PPS) of [[:Category:GPS\|GPS]], [[:Category:GLONASS\|GLONASS]] provides a standard precision (SP) navigation signal and a high precision (HP) navigation signal, also referred to as Channel of Standard Accuracy (CSA) and Channel of High Accuracy (CHA), respectively.		Equivalent to the Standard Positioning Service (SPS) and the Precise Positioning Service (PPS) of [[:Category:GPS\|GPS]], [[:Category:GLONASS\|GLONASS]] provides a standard precision (SP) navigation signal and a high precision (HP) navigation signal, also referred to as Channel of Standard Accuracy (CSA) and Channel of High Accuracy (CHA), respectively.

	However, as in GPS there is Standard Positioning Service Performance and the Precise Positioning Standard, in [[:Category:GLONASS\|GLONASS]] there is no document specifying the performances provided by each service. According to Sergey Revnivykh, the deputy head of the GLONASS Mission Control Center, a GLONASS performance document will be released in the 2012-2013 time frame.<ref>[http://www.gpsworld.com~~/gnss-system/glonass/news/glonass-update-delves-constellation-details-10499~~ GLONASS Update Delves into Constellation Details, GPSWorld]</ref>		However, as in GPS there is Standard Positioning Service Performance and the Precise Positioning Standard, in [[:Category:GLONASS\|GLONASS]] there is no document specifying the performances provided by each service. According to Sergey Revnivykh, the deputy head of the GLONASS Mission Control Center, a GLONASS performance document will be released in the 2012-2013 time frame.<ref>[http://www.gpsworld.com GLONASS Update Delves into Constellation Details, GPSWorld]</ref>

	It has been stated<ref>"A Review of GLONASS" Miller, 2000</ref> that at peak efficiency, the SP signal offers horizontal positioning accuracy within 5–10 meters, vertical positioning within 15 meters, a velocity vector measuring within 10 cm/s, and timing within 200 ns. However these specifications are outdated, based on the performances provided by [[:Category:GLONASS\|GLONASS]] in the year 2000, before starting the Modernization Plan.		It has been stated<ref>"A Review of GLONASS" Miller, 2000</ref> that at peak efficiency, the SP signal offers horizontal positioning accuracy within 5–10 meters, vertical positioning within 15 meters, a velocity vector measuring within 10 cm/s, and timing within 200 ns. However these specifications are outdated, based on the performances provided by [[:Category:GLONASS\|GLONASS]] in the year 2000, before starting the Modernization Plan.
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	==GLONASS Accuracy==		==GLONASS Accuracy==
	In the beginning of the century, one of the main objectives of the [[:Category:GLONASS\|GLONASS]] program was to ensure performances similar to [[:Category:GPS\|GPS]] by the end of 2011~~<ref name="Modernization">[http://www.oosa.unvienna.org/pdf/sap/2012/un-latvia/ppt/1-2.pdf]</ref>~~. GLONASS traditional poorer performance was the culmination of several factors, such as, poor on board atomic clocks or less accuracy in GLONASS broadcast ephemeris.<ref name="GlonassFuture_InsideGNSS">[http://www.insidegnss.com/~~node/591~~ Russia Dwells on Glonass Future, InsideGNSS]</ref>		In the beginning of the century, one of the main objectives of the [[:Category:GLONASS\|GLONASS]] program was to ensure performances similar to [[:Category:GPS\|GPS]] by the end of 2011. GLONASS traditional poorer performance was the culmination of several factors, such as, poor on board atomic clocks or less accuracy in GLONASS broadcast ephemeris.<ref name="GlonassFuture_InsideGNSS">[http://www.insidegnss.com/ Russia Dwells on Glonass Future, InsideGNSS]</ref>
	The improvements carried out on the space, ground-based and user equipment segments have paid off, having recovered [[:Category:GLONASS\|GLONASS]].~~<ref name="Modernization"></ref>~~ As it is shown in the figure below, in 2006 GLONASS accuracy at 1 sigma was in the order of 35 m, and in 2011 the accuracy of GLONASS reached less than 3 meters, hence similar to the GPS one.		The improvements carried out on the space, ground-based and user equipment segments have paid off, having recovered [[:Category:GLONASS\|GLONASS]]. As it is shown in the figure below, in 2006 GLONASS accuracy at 1 sigma was in the order of 35 m, and in 2011 the accuracy of GLONASS reached less than 3 meters, hence similar to the GPS one.

	[[File:GLONASS_AccuracyEvolution.jpg\|500px\|\|'''''Figure 2:''''' GLONASS Accuracy Improvement~~<ref name="Modernization"></ref>~~\|centre\|thumb]]		[[File:GLONASS_AccuracyEvolution.jpg\|500px\|\|'''''Figure 2:''''' GLONASS Accuracy Improvement\|centre\|thumb]]

	==GLONASS Accuracy Comparison==		==GLONASS Accuracy Comparison==

Filipe.Pelica at 17:46, 26 May 2014

2014-05-26T17:46:10Z

← Older revision		Revision as of 17:46, 26 May 2014
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	==Combined Services Performances==		==Combined Services Performances==
	By combining GLONASS with other GNSS systems, such as GPS, ~~GALILEO~~, ~~COMPASS~~, SBAS and GBAS, improved performance in the following domains can be expected:		By combining GLONASS with other GNSS systems, such as GPS, Galileo, BeiDou, SBAS and GBAS, improved performance in the following domains can be expected:
	*[[Availability]]: Using as an example GLONASS in combination with GPS, the number of operational satellites will increase from 8-9 satellites to 18-19 (as it is shown in the table below). This is especially important in urban canyon environments, where the presence of large buildings leads to frequent shadowing of signal.		*[[Availability]]: Using as an example GLONASS in combination with GPS, the number of operational satellites will increase from 8-9 satellites to 18-19 (as it is shown in the table below). This is especially important in urban canyon environments, where the presence of large buildings leads to frequent shadowing of signal.
	*Position [[Accuracy]]: Allied to an increased availability in restricted environments (urban) is a better geometry of spacecraft or enhanced positioning performance.		*Position [[Accuracy]]: Allied to an increased availability in restricted environments (urban) is a better geometry of spacecraft or enhanced positioning performance.

Filipe.Pelica: fix header.

2014-01-10T17:09:08Z

fix header.

← Older revision		Revision as of 17:09, 10 January 2014
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	~~{{Article Infobox2}}~~
	{{Article Infobox2		{{Article Infobox2
	\|Category=GLONASS		\|Category=GLONASS
	\|~~Editors~~=GMV		\|Authors=GMV
	\|Level=Basic		\|Level=Basic
	\|YearOfPublication=2011		\|YearOfPublication=2011
	\|~~Title~~=~~{{PAGENAME}}~~		\|Logo=GMV
	}}		}}

	Equivalent to the Standard Positioning Service (SPS) and the Precise Positioning Service (PPS) of [[:Category:GPS\|GPS]], [[:Category:GLONASS\|GLONASS]] provides a standard precision (SP) navigation signal and a high precision (HP) navigation signal, also referred to as Channel of Standard Accuracy (CSA) and Channel of High Accuracy (CHA), respectively.		Equivalent to the Standard Positioning Service (SPS) and the Precise Positioning Service (PPS) of [[:Category:GPS\|GPS]], [[:Category:GLONASS\|GLONASS]] provides a standard precision (SP) navigation signal and a high precision (HP) navigation signal, also referred to as Channel of Standard Accuracy (CSA) and Channel of High Accuracy (CHA), respectively.

Filipe.Pelica: fix header.

2014-01-10T17:06:41Z

fix header.

← Older revision		Revision as of 17:06, 10 January 2014
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			{{Article Infobox2}}
			{{Article Infobox2
			\|Category=GLONASS
			\|Editors=GMV
			\|Level=Basic
			\|YearOfPublication=2011
			\|Title={{PAGENAME}}
			}}

	Equivalent to the Standard Positioning Service (SPS) and the Precise Positioning Service (PPS) of [[:Category:GPS\|GPS]], [[:Category:GLONASS\|GLONASS]] provides a standard precision (SP) navigation signal and a high precision (HP) navigation signal, also referred to as Channel of Standard Accuracy (CSA) and Channel of High Accuracy (CHA), respectively.		Equivalent to the Standard Positioning Service (SPS) and the Precise Positioning Service (PPS) of [[:Category:GPS\|GPS]], [[:Category:GLONASS\|GLONASS]] provides a standard precision (SP) navigation signal and a high precision (HP) navigation signal, also referred to as Channel of Standard Accuracy (CSA) and Channel of High Accuracy (CHA), respectively.

Teresa.Ferreira: /* GLONASS Availability */

2012-12-10T10:44:12Z

GLONASS Availability

← Older revision		Revision as of 10:44, 10 December 2012
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	\|}		\|}

	According to the table above, in January 23 2012 there were 31 [[:Category:GLONASS\|GLONASS]] satellites in orbit, being 23 of them in operational status. The following figure presents the corresponding worldwide Availability Performance (calculated as the percentage of time during which the condition [[Positioning Error\|PDOP]] = 6 is valid ~~at mask angles =~~ 5 ~~deg~~).		According to the table above, in January 23 2012 there were 31 [[:Category:GLONASS\|GLONASS]] satellites in orbit, being 23 of them in operational status. The following figure presents the corresponding worldwide Availability Performance (calculated as the percentage of time during which the condition [[Positioning Error\|PDOP]] = 6 is valid for a masking angle of 5 degrees).
	::::[[File:GLONASSavailability.jpg\|none\|thumb\|500px\|'''''Figure 1:''''' Integral availability of GLONASS navigation (PDOP=6) during the 24 hours period (~~mask~~ angle =5 deg) Date: 23.01.2012]]		::::[[File:GLONASSavailability.jpg\|none\|thumb\|500px\|'''''Figure 1:''''' Integral availability of GLONASS navigation (PDOP=6) during the 24 hours period (masking angle =5 deg) Date: 23.01.2012]]

	==GLONASS Accuracy==		==GLONASS Accuracy==

Teresa.Ferreira: /* GLONASS Availability */

2012-12-10T10:43:13Z

GLONASS Availability

← Older revision		Revision as of 10:43, 10 December 2012
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	\|}		\|}

	According ~~with~~ the above ~~table~~, in January 23 there were 31 [[:Category:GLONASS\|GLONASS]] satellites in orbit, being 23 of them in operational status. ~~In the~~ following figure ~~is represented correspondent~~ the worldwide Availability Performance (calculated as the percentage of time during which the condition [[Positioning Error\|PDOP]] = 6 is valid at mask angles = 5 deg) ~~where can be seen the non-availability of the system in some regions of the globe~~.		According to the table above, in January 23 2012 there were 31 [[:Category:GLONASS\|GLONASS]] satellites in orbit, being 23 of them in operational status. The following figure presents the corresponding worldwide Availability Performance (calculated as the percentage of time during which the condition [[Positioning Error\|PDOP]] = 6 is valid at mask angles = 5 deg).
	::::[[File:GLONASSavailability.jpg\|none\|thumb\|500px\|'''''Figure 1:''''' Integral availability of GLONASS navigation (PDOP=6) during the 24 hours period (mask angle =5 deg) Date: 23.01.2012]]		::::[[File:GLONASSavailability.jpg\|none\|thumb\|500px\|'''''Figure 1:''''' Integral availability of GLONASS navigation (PDOP=6) during the 24 hours period (mask angle =5 deg) Date: 23.01.2012]]

Teresa.Ferreira: /* Combined Services Performances */

2012-12-10T10:41:20Z

Combined Services Performances

← Older revision		Revision as of 10:41, 10 December 2012
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	~~In the~~ following table ~~is depicted~~ a comparison example of the navigation error (at 95% probability) provided by GLONASS only solution and GLONASS in combination with GPS, as well as the number of satellites in view in four different reference stations:<ref>[http://www.sdcm.ru/smglo/stparam?version=eng&repdate&site=extern Precision of GLONASS/GPS Navigation Definitions, SDCM]</ref>		The following table depicts a comparison example of the navigation error (at 95% probability) provided by GLONASS only solution and GLONASS in combination with GPS, as well as the number of satellites in view in four different reference stations:<ref>[http://www.sdcm.ru/smglo/stparam?version=eng&repdate&site=extern Precision of GLONASS/GPS Navigation Definitions, SDCM]</ref>

	{\|class="wikitable"		{\|class="wikitable"

Filipe.Pelica: /* GLONASS Availability */

2012-12-07T16:16:43Z

GLONASS Availability

← Older revision		Revision as of 16:16, 7 December 2012
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	==GLONASS Availability==		==GLONASS Availability==
	The low number of operational satellites in the constellation (in 2001 there were only seven satellites) along with a ground segment limited to Russian territory, have been the main reasons of [[:Category:GLONASS\|GLONASS]] poor availability performance. The modernization of the [[GLONASS Ground Segment\|Ground Segment]], including new monitoring stations (some of them outside Russia) and especially the increase of the number of satellites in the constellation (in the present, [[:Category:GLONASS\|GLONASS]] constellation consists of 29 satellites in orbit although only 23 of them are operational), have led to almost worldwide coverage and 100% availability in the Russian territory.		The low number of operational satellites in the constellation (in 2001 there were only seven satellites) along with a ground segment limited to Russian territory, have been the main reasons of [[:Category:GLONASS\|GLONASS]] poor availability performance. The modernization of the [[GLONASS Ground Segment\|Ground Segment]], including new monitoring stations (some of them outside Russia) and especially the increase of the number of satellites in the constellation (in the present, [[:Category:GLONASS\|GLONASS]] constellation consists of 31 satellites in orbit although only 23 of them are operational), have led to almost worldwide coverage and 100% availability in the Russian territory.

	The table included below shows the increasing of the number of satellites and the availability performance (calculated as the percentage of time during which the condition PDOP = 6 is valid at mask angles = 5 deg) from the beginning of 2007 to beginning 2012.<ref>[http://www.glonass-center.ru/en/archive/ Information-Analytical Centre, Archive]</ref>		The table included below shows the increasing of the number of satellites and the availability performance (calculated as the percentage of time during which the condition PDOP <= 6 is valid at mask angles >= 5 deg) from the beginning of 2007 to beginning 2012.<ref>[http://www.glonass-center.ru/en/archive/ Information-Analytical Centre, Archive]</ref>
	{\| class="wikitable"		{\| class="wikitable"
	!rowspan="1"\|Date		!rowspan="1"\|Date

Filipe.Pelica at 16:13, 7 December 2012

2012-12-07T16:13:41Z

Show changes

Filipe.Pelica: /* GLONASS Availability */

2012-12-04T15:54:46Z

GLONASS Availability

← Older revision		Revision as of 15:54, 4 December 2012
Line 15:		Line 15:

	==GLONASS Availability==		==GLONASS Availability==
	The low number of operational satellites in the constellation (in 2001 there were only seven satellites) along with a ground segment limited to Russian territory, have been the main reasons of [[:Category:GLONASS\|GLONASS]] poor availability performance. The modernization of the [[GLONASS Ground Segment\|Ground Segment]], including new monitoring stations (some of them outside Russia) and especially the increase of the number of satellites in the constellation (in the present, [[:Category:GLONASS\|GLONASS]] constellation consists of 31 satellites in orbit although only 23 of them are operational), have led to almost worldwide coverage and 100% availability in the Russian territory.		The low number of operational satellites in the constellation (in 2001 there were only seven satellites) along with a ground segment limited to Russian territory, have been the main reasons of [[:Category:GLONASS\|GLONASS]] poor availability performance. The modernization of the [[GLONASS Ground Segment\|Ground Segment]], including new monitoring stations (some of them outside Russia) and especially the increase of the number of satellites in the constellation (in the present, [[:Category:GLONASS\|GLONASS]] constellation consists of 29 satellites in orbit although only 23 of them are operational), have led to almost worldwide coverage and 100% availability in the Russian territory.

	The table included below shows the increasing of the number of satellites and the availability performance (calculated as the percentage of time during which the condition PDOP ≤ 6 is valid at mask angles ≥ 5 deg) from the beginning of 2007 to beginning 2012.<ref>[http://www.glonass-center.ru/en/archive/ Information-Analytical Centre, Archive]</ref>		The table included below shows the increasing of the number of satellites and the availability performance (calculated as the percentage of time during which the condition PDOP ≤ 6 is valid at mask angles ≥ 5 deg) from the beginning of 2007 to beginning 2012.<ref>[http://www.glonass-center.ru/en/archive/ Information-Analytical Centre, Archive]</ref>

← Older revision		Revision as of 17:21, 22 June 2018
Line 8:		Line 8:
	Equivalent to the Standard Positioning Service (SPS) and the Precise Positioning Service (PPS) of [[:Category:GPS\|GPS]], [[:Category:GLONASS\|GLONASS]] provides a standard precision (SP) navigation signal and a high precision (HP) navigation signal, also referred to as Channel of Standard Accuracy (CSA) and Channel of High Accuracy (CHA), respectively.		Equivalent to the Standard Positioning Service (SPS) and the Precise Positioning Service (PPS) of [[:Category:GPS\|GPS]], [[:Category:GLONASS\|GLONASS]] provides a standard precision (SP) navigation signal and a high precision (HP) navigation signal, also referred to as Channel of Standard Accuracy (CSA) and Channel of High Accuracy (CHA), respectively.

	However, as in GPS there is Standard Positioning Service Performance and the Precise Positioning Standard, in [[:Category:GLONASS\|GLONASS]] there is no document specifying the performances provided by each service. According to Sergey Revnivykh, the deputy head of the GLONASS Mission Control Center, a GLONASS performance document will be released in the 2012-2013 time frame.<ref>[http://www.gpsworld.com~~/gnss-system/glonass/news/glonass-update-delves-constellation-details-10499~~ GLONASS Update Delves into Constellation Details, GPSWorld]</ref>		However, as in GPS there is Standard Positioning Service Performance and the Precise Positioning Standard, in [[:Category:GLONASS\|GLONASS]] there is no document specifying the performances provided by each service. According to Sergey Revnivykh, the deputy head of the GLONASS Mission Control Center, a GLONASS performance document will be released in the 2012-2013 time frame.<ref>[http://www.gpsworld.com GLONASS Update Delves into Constellation Details, GPSWorld]</ref>

	It has been stated<ref>"A Review of GLONASS" Miller, 2000</ref> that at peak efficiency, the SP signal offers horizontal positioning accuracy within 5–10 meters, vertical positioning within 15 meters, a velocity vector measuring within 10 cm/s, and timing within 200 ns. However these specifications are outdated, based on the performances provided by [[:Category:GLONASS\|GLONASS]] in the year 2000, before starting the Modernization Plan.		It has been stated<ref>"A Review of GLONASS" Miller, 2000</ref> that at peak efficiency, the SP signal offers horizontal positioning accuracy within 5–10 meters, vertical positioning within 15 meters, a velocity vector measuring within 10 cm/s, and timing within 200 ns. However these specifications are outdated, based on the performances provided by [[:Category:GLONASS\|GLONASS]] in the year 2000, before starting the Modernization Plan.
Line 64:		Line 64:

	==GLONASS Accuracy==		==GLONASS Accuracy==
	In the beginning of the century, one of the main objectives of the [[:Category:GLONASS\|GLONASS]] program was to ensure performances similar to [[:Category:GPS\|GPS]] by the end of 2011~~<ref name="Modernization">[http://www.oosa.unvienna.org/pdf/sap/2012/un-latvia/ppt/1-2.pdf]</ref>~~. GLONASS traditional poorer performance was the culmination of several factors, such as, poor on board atomic clocks or less accuracy in GLONASS broadcast ephemeris.<ref name="GlonassFuture_InsideGNSS">[http://www.insidegnss.com/~~node/591~~ Russia Dwells on Glonass Future, InsideGNSS]</ref>		In the beginning of the century, one of the main objectives of the [[:Category:GLONASS\|GLONASS]] program was to ensure performances similar to [[:Category:GPS\|GPS]] by the end of 2011. GLONASS traditional poorer performance was the culmination of several factors, such as, poor on board atomic clocks or less accuracy in GLONASS broadcast ephemeris.<ref name="GlonassFuture_InsideGNSS">[http://www.insidegnss.com/ Russia Dwells on Glonass Future, InsideGNSS]</ref>
	The improvements carried out on the space, ground-based and user equipment segments have paid off, having recovered [[:Category:GLONASS\|GLONASS]].~~<ref name="Modernization"></ref>~~ As it is shown in the figure below, in 2006 GLONASS accuracy at 1 sigma was in the order of 35 m, and in 2011 the accuracy of GLONASS reached less than 3 meters, hence similar to the GPS one.		The improvements carried out on the space, ground-based and user equipment segments have paid off, having recovered [[:Category:GLONASS\|GLONASS]]. As it is shown in the figure below, in 2006 GLONASS accuracy at 1 sigma was in the order of 35 m, and in 2011 the accuracy of GLONASS reached less than 3 meters, hence similar to the GPS one.

	[[File:GLONASS_AccuracyEvolution.jpg\|500px\|\|'''''Figure 2:''''' GLONASS Accuracy Improvement~~<ref name="Modernization"></ref>~~\|centre\|thumb]]		[[File:GLONASS_AccuracyEvolution.jpg\|500px\|\|'''''Figure 2:''''' GLONASS Accuracy Improvement\|centre\|thumb]]

	==GLONASS Accuracy Comparison==		==GLONASS Accuracy Comparison==