QZSS - Revision history

Gema.Cueto: Major update to include new QSZ satellite system, signals, services, performance and future developments.

2021-09-29T11:53:15Z

Major update to include new QSZ satellite system, signals, services, performance and future developments.

Claudia.Prajanu at 16:35, 2 September 2018

2018-09-02T16:35:25Z

← Older revision		Revision as of 16:35, 2 September 2018
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	QZSS was authorized by the Japanese government in 2002. At the beginning the system was developed by the Advanced Space Business Corporation (ASBC) team,<ref name="SS">[http://www.aprsaf.org/data/aprsaf15_data/csawg/CSAWG_6d.pdf Shigeru Matsuoka, ''Service Status of QZSS'', Satellite Positioning Research and Application Center PNT Application and promotion Division, Dec.10 2008]</ref> including Mitsubishi Electric Corp., Hitachi Ltd., and GNSS Technologies Inc. When in 2007 ASBC collapsed, the work was taken over by JAXA together with [http://www.eiseisokui.or.jp/en/ Satellite Positioning Research and Application Center (SPAC)], established in February 2007 and approved by the Ministers associated with QZSS research and development.<ref name="QZSS_Wiki"/><ref name="QZSS_ICG">[http://www.~~oosa.unvienna~~.org/~~pdf/icg/2009/icg-4/05-1.pdf~~ ''Current Status of the Quasi-Zenith Satellite System''] Presentation at ICG-4 Meeting, Saint-Petersburg, September 2009</ref>		QZSS was authorized by the Japanese government in 2002. At the beginning the system was developed by the Advanced Space Business Corporation (ASBC) team,<ref name="SS">[http://www.aprsaf.org/data/aprsaf15_data/csawg/CSAWG_6d.pdf Shigeru Matsuoka, ''Service Status of QZSS'', Satellite Positioning Research and Application Center PNT Application and promotion Division, Dec.10 2008]</ref> including Mitsubishi Electric Corp., Hitachi Ltd., and GNSS Technologies Inc. When in 2007 ASBC collapsed, the work was taken over by JAXA together with [http://www.eiseisokui.or.jp/en/ Satellite Positioning Research and Application Center (SPAC)], established in February 2007 and approved by the Ministers associated with QZSS research and development.<ref name="QZSS_Wiki"/><ref name="QZSS_ICG">[http://www.unoosa.org/ ''Current Status of the Quasi-Zenith Satellite System''] Presentation at ICG-4 Meeting, Saint-Petersburg, September 2009</ref>

	==QZSS System description==		==QZSS System description==
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	The '''ground segment''' is composed of a master control station (MCS), tracking control stations (TT&C), laser ranging stations and monitoring stations. The network of monitoring stations covers East Asia and Oceania region, with stations in Japan (Okinawa, Sarobetsu, Koganei, Ogasawara) and abroad: Bangalore (India), Guam, Canberra (Australia), Bangkok (Thailand) and Hawaii (USA). The MSC is the responsible of the navigation message generation that are uplinked to the quasi-zenith satellite via a TT&C station place in Okinawa.<ref name="QZSS_ICG"/><ref name="QZSS_Munich"/>		The '''ground segment''' is composed of a master control station (MCS), tracking control stations (TT&C), laser ranging stations and monitoring stations. The network of monitoring stations covers East Asia and Oceania region, with stations in Japan (Okinawa, Sarobetsu, Koganei, Ogasawara) and abroad: Bangalore (India), Guam, Canberra (Australia), Bangkok (Thailand) and Hawaii (USA). The MSC is the responsible of the navigation message generation that are uplinked to the quasi-zenith satellite via a TT&C station place in Okinawa.<ref name="QZSS_ICG"/><ref name="QZSS_Munich"/>

	There are [[QZSS_Signal_Plan\|6 '''signals''' planned]] for the QZSS system:<ref name="QZSS_ICG"/><ref>~~[http://qz-vision.jaxa.jp/USE/is-qzss/index_e.html~~ QZSS system description in Jaxa website]</ref>		There are [[QZSS_Signal_Plan\|6 '''signals''' planned]] for the QZSS system:<ref name="QZSS_ICG"/><ref> QZSS system description in Jaxa website</ref>

	* L1-C/A (1575.42 MHz): Used by combining with GNSS; increase availability of PNT services.		* L1-C/A (1575.42 MHz): Used by combining with GNSS; increase availability of PNT services.
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	During the initial phase, technical verifications and applications demonstrations have been made using ''Michibiki''. The demonstrations have shown that in a case of a car driving route inside Tokyo, time percentage when a GPS+QZSS user could get his position improved more than 10% of the GPS-only user, with a best improvement over 40% in the worst GPS DOP situation.<ref name="QZSS_Munich"/>		During the initial phase, technical verifications and applications demonstrations have been made using ''Michibiki''. The demonstrations have shown that in a case of a car driving route inside Tokyo, time percentage when a GPS+QZSS user could get his position improved more than 10% of the GPS-only user, with a best improvement over 40% in the worst GPS DOP situation.<ref name="QZSS_Munich"/>

	In 2011 the Government of Japan has decided to accelerate the QZSS deployment in order to reach a 4-satellite constellation by the late 2010s, while aiming at a final 7-satellite constellation in the future<ref>[http://www.igs.org~~/assets/pdf/Poland%202012%20-%20ICG%20Kogure%20PR66.pdf\|~~Future Plan of QZSS, 2012]</ref>.		In 2011 the Government of Japan has decided to accelerate the QZSS deployment in order to reach a 4-satellite constellation by the late 2010s, while aiming at a final 7-satellite constellation in the future<ref>[http://www.igs.org Future Plan of QZSS, 2012]</ref>.

	Later on March 2013, the Japanese Cabinet Office has formally announced a ¥50 billion (US$540 million) contract award with Mitsubishi to build one geostationary satellite and two additional quasi-zenith satellites (QZSs). The three satellites are scheduled to be launched before the end of 2017. In addition, another contract was also signed with a special purpose company (led by NEC and supported by Mitsubishi UFJ Lease & Finance and Mitsubishi Electric Corporation) to fund the design and construction of the ground control system as well as its verification and maintenance for a period of 15 years <ref>[http://www.insidegnss.com~~/node/3510~~ Japan Awards Contracts for QZSS Space, Ground Segments, March 2013]</ref>.		Later on March 2013, the Japanese Cabinet Office has formally announced a ¥50 billion (US$540 million) contract award with Mitsubishi to build one geostationary satellite and two additional quasi-zenith satellites (QZSs). The three satellites are scheduled to be launched before the end of 2017. In addition, another contract was also signed with a special purpose company (led by NEC and supported by Mitsubishi UFJ Lease & Finance and Mitsubishi Electric Corporation) to fund the design and construction of the ground control system as well as its verification and maintenance for a period of 15 years <ref>[http://www.insidegnss.com Japan Awards Contracts for QZSS Space, Ground Segments, March 2013]</ref>.

	==Notes==		==Notes==

Paulo.Pombal: /* QZSS System description */

2016-05-18T14:41:15Z

QZSS System description

← Older revision		Revision as of 14:41, 18 May 2016
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	QZSS '''applications''' are: mobile mapping, IT aided precise farming, IT aided construction, fleet management, marine and transportation applications, among others.<ref name="QZSS_Munich"/>		QZSS '''applications''' are: mobile mapping, IT aided precise farming, IT aided construction, fleet management, marine and transportation applications, among others.<ref name="QZSS_Munich"/>

			Finally, QZSS will provide positioning-related services and a messaging service, as follows:<ref>Satoshi Kogure, JAXA, IGNSS 2015, Surfers Paradise, Australia, 14-16 July, 2015</ref><br>
			Positioning-related services:
			* Satellite Positioning Service: will provide the same as GPS satellites in spite of urban and mountain areas
			* Sub-Meter Level Augmentation Service: will provide accurate positioning around 2-3 meters
			* Centimeter Level Augmentation Service: will provide highly accurate positioning around 10 centimeters
			* Position Technology Verification Services: will provide an application demonstration for new positioning technology

			Messaging service:
			* Short Message Delivery Service: will provide users in the field with disaster management and rescue

	==QZSS Development==		==QZSS Development==

Paulo.Pombal: /* QZSS System description */

2016-05-16T17:52:56Z

QZSS System description

← Older revision		Revision as of 17:52, 16 May 2016
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	[[File:Qzss-45-0_09.jpg\|QZSS satellites groundtrack\|thumb]]		[[File:Qzss-45-0_09.jpg\|QZSS satellites groundtrack\|thumb]]

	The '''space segment''' consists of three satellites placed in periodic Highly Elliptical Orbit (HEO).<ref name="QZSS_Wiki"/><ref name="QZSS_Munich"/> ~~The~~ perigee altitude is about 32000 km and apogee altitude about 40000 km, and all of them will pass over the same groundtrack. QZSS is designed so that at least one satellite out of three satellites exists near zenith over Japan. Given its orbit, each satellite appears almost overhead most of the time (i.e., more than 12 hours a day with an elevation above 70°). This gives rise to the term "quasi-zenith" for which the system is named. The design life of the quasi-zenith satellites is of 10 years. The first satellite ''Michibiki'' was launched on 11 September 2010 and injected into the Quasi-Zenith Orbit on 27 September.<ref name="QZSS_ICG"/><ref name="QZSS_Munich"> Koji Terada (JAXA), ''Current Status of Quasi-Zenith Satellite System (QZSS), presentation at the Munich Navigation Congress, March 2011.</ref>		The '''space segment''' consists of three satellites placed in periodic Highly Elliptical Orbit (HEO) and a fourth in a geo-stationary orbit.<ref name="QZSS_Wiki"/><ref name="QZSS_Munich"/> For the satellites in HEO, the perigee altitude is about 32000 km and apogee altitude about 40000 km, and all of them will pass over the same groundtrack. QZSS is designed so that at least one satellite out of three satellites exists near zenith over Japan. Given its orbit, each satellite appears almost overhead most of the time (i.e., more than 12 hours a day with an elevation above 70°). This gives rise to the term "quasi-zenith" for which the system is named. The design life of the quasi-zenith satellites is of 10 years. The first satellite ''Michibiki'' was launched on 11 September 2010 and injected into the Quasi-Zenith Orbit on 27 September.<ref name="QZSS_ICG"/><ref name="QZSS_Munich"> Koji Terada (JAXA), ''Current Status of Quasi-Zenith Satellite System (QZSS), presentation at the Munich Navigation Congress, March 2011.</ref>

	The '''ground segment''' is composed of a master control station (MCS), tracking control stations (TT&C), laser ranging stations and monitoring stations. The network of monitoring stations covers East Asia and Oceania region, with stations in Japan (Okinawa, Sarobetsu, Koganei, Ogasawara) and abroad: Bangalore (India), Guam, Canberra (Australia), Bangkok (Thailand) and Hawaii (USA). The MSC is the responsible of the navigation message generation that are uplinked to the quasi-zenith satellite via a TT&C station place in Okinawa.<ref name="QZSS_ICG"/><ref name="QZSS_Munich"/>		The '''ground segment''' is composed of a master control station (MCS), tracking control stations (TT&C), laser ranging stations and monitoring stations. The network of monitoring stations covers East Asia and Oceania region, with stations in Japan (Okinawa, Sarobetsu, Koganei, Ogasawara) and abroad: Bangalore (India), Guam, Canberra (Australia), Bangkok (Thailand) and Hawaii (USA). The MSC is the responsible of the navigation message generation that are uplinked to the quasi-zenith satellite via a TT&C station place in Okinawa.<ref name="QZSS_ICG"/><ref name="QZSS_Munich"/>

Paulo.Pombal: /* QZSS System description */

2015-12-09T17:52:47Z

QZSS System description

← Older revision		Revision as of 17:52, 9 December 2015
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	The '''ground segment''' is composed of a master control station (MCS), tracking control stations (TT&C), laser ranging stations and monitoring stations. The network of monitoring stations covers East Asia and Oceania region, with stations in Japan (Okinawa, Sarobetsu, Koganei, Ogasawara) and abroad: Bangalore (India), Guam, Canberra (Australia), Bangkok (Thailand) and Hawaii (USA). The MSC is the responsible of the navigation message generation that are uplinked to the quasi-zenith satellite via a TT&C station place in Okinawa.<ref name="QZSS_ICG"/><ref name="QZSS_Munich"/>		The '''ground segment''' is composed of a master control station (MCS), tracking control stations (TT&C), laser ranging stations and monitoring stations. The network of monitoring stations covers East Asia and Oceania region, with stations in Japan (Okinawa, Sarobetsu, Koganei, Ogasawara) and abroad: Bangalore (India), Guam, Canberra (Australia), Bangkok (Thailand) and Hawaii (USA). The MSC is the responsible of the navigation message generation that are uplinked to the quasi-zenith satellite via a TT&C station place in Okinawa.<ref name="QZSS_ICG"/><ref name="QZSS_Munich"/>

	There are 6 '''signals''' planned for the QZSS system:<ref name="QZSS_ICG"/><ref>[http://qz-vision.jaxa.jp/USE/is-qzss/index_e.html QZSS system description in Jaxa website]</ref>		There are [[QZSS_Signal_Plan\|6 '''signals''' planned]] for the QZSS system:<ref name="QZSS_ICG"/><ref>[http://qz-vision.jaxa.jp/USE/is-qzss/index_e.html QZSS system description in Jaxa website]</ref>

	* L1-C/A (1575.42 MHz): Used by combining with GNSS; increase availability of PNT services.		* L1-C/A (1575.42 MHz): Used by combining with GNSS; increase availability of PNT services.

Filipe.Pelica: Included editor logo.

2014-09-18T17:22:04Z

Included editor logo.

← Older revision		Revision as of 17:22, 18 September 2014
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	\|Level=Basic		\|Level=Basic
	\|YearOfPublication=2011		\|YearOfPublication=2011
			\|Logo=GMV
	\|Title={{PAGENAME}}		\|Title={{PAGENAME}}
	}}		}}

Filipe.Pelica: fixed broken link

2014-05-19T14:25:19Z

fixed broken link

← Older revision		Revision as of 14:25, 19 May 2014
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	During the initial phase, technical verifications and applications demonstrations have been made using ''Michibiki''. The demonstrations have shown that in a case of a car driving route inside Tokyo, time percentage when a GPS+QZSS user could get his position improved more than 10% of the GPS-only user, with a best improvement over 40% in the worst GPS DOP situation.<ref name="QZSS_Munich"/>		During the initial phase, technical verifications and applications demonstrations have been made using ''Michibiki''. The demonstrations have shown that in a case of a car driving route inside Tokyo, time percentage when a GPS+QZSS user could get his position improved more than 10% of the GPS-only user, with a best improvement over 40% in the worst GPS DOP situation.<ref name="QZSS_Munich"/>

	In 2011 the Government of Japan has decided to accelerate the QZSS deployment in order to reach a 4-satellite constellation by the late 2010s, while aiming at a final 7-satellite constellation in the future<ref>[http://www.~~oosa.unvienna~~.org/pdf/~~sap/2012/un-latvia/ppt/1~~-3.pdf\|Future Plan of QZSS, 2012]</ref>.		In 2011 the Government of Japan has decided to accelerate the QZSS deployment in order to reach a 4-satellite constellation by the late 2010s, while aiming at a final 7-satellite constellation in the future<ref>[http://www.igs.org/assets/pdf/Poland%202012%20-%20ICG%20Kogure%20PR66.pdf\|Future Plan of QZSS, 2012]</ref>.

	Later on March 2013, the Japanese Cabinet Office has formally announced a ¥50 billion (US$540 million) contract award with Mitsubishi to build one geostationary satellite and two additional quasi-zenith satellites (QZSs). The three satellites are scheduled to be launched before the end of 2017. In addition, another contract was also signed with a special purpose company (led by NEC and supported by Mitsubishi UFJ Lease & Finance and Mitsubishi Electric Corporation) to fund the design and construction of the ground control system as well as its verification and maintenance for a period of 15 years <ref>[http://www.insidegnss.com/node/3510 Japan Awards Contracts for QZSS Space, Ground Segments, March 2013]</ref>.		Later on March 2013, the Japanese Cabinet Office has formally announced a ¥50 billion (US$540 million) contract award with Mitsubishi to build one geostationary satellite and two additional quasi-zenith satellites (QZSs). The three satellites are scheduled to be launched before the end of 2017. In addition, another contract was also signed with a special purpose company (led by NEC and supported by Mitsubishi UFJ Lease & Finance and Mitsubishi Electric Corporation) to fund the design and construction of the ground control system as well as its verification and maintenance for a period of 15 years <ref>[http://www.insidegnss.com/node/3510 Japan Awards Contracts for QZSS Space, Ground Segments, March 2013]</ref>.

Teresa.Ferreira at 21:56, 30 April 2013

2013-04-30T21:56:49Z

← Older revision		Revision as of 21:56, 30 April 2013
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	In 2011 the Government of Japan has decided to accelerate the QZSS deployment in order to reach a 4-satellite constellation by the late 2010s, while aiming at a final 7-satellite constellation in the future<ref>[http://www.oosa.unvienna.org/pdf/sap/2012/un-latvia/ppt/1-3.pdf\|Future Plan of QZSS, 2012]</ref>.		In 2011 the Government of Japan has decided to accelerate the QZSS deployment in order to reach a 4-satellite constellation by the late 2010s, while aiming at a final 7-satellite constellation in the future<ref>[http://www.oosa.unvienna.org/pdf/sap/2012/un-latvia/ppt/1-3.pdf\|Future Plan of QZSS, 2012]</ref>.

	Later on March 2013, the Japanese Cabinet Office has formally announced a ¥50 billion (US$540 million) contract award with Mitsubishi to build one geostationary satellite and two additional quasi-zenith satellites (QZSs). The three satellites are scheduled to be launched before the end of 2017. In addition was also signed ~~another contract~~ with a special purpose company (led by NEC and supported by Mitsubishi UFJ Lease & Finance and Mitsubishi Electric Corporation) to fund the design and construction of the ground control system as well ~~it's~~ verification and maintenance for a period of 15 years. <ref>[http://www.insidegnss.com/node/3510\| Japan Awards Contracts for QZSS Space, Ground Segments, March 2013]</ref>.		Later on March 2013, the Japanese Cabinet Office has formally announced a ¥50 billion (US$540 million) contract award with Mitsubishi to build one geostationary satellite and two additional quasi-zenith satellites (QZSs). The three satellites are scheduled to be launched before the end of 2017. In addition, another contract was also signed with a special purpose company (led by NEC and supported by Mitsubishi UFJ Lease & Finance and Mitsubishi Electric Corporation) to fund the design and construction of the ground control system as well as its verification and maintenance for a period of 15 years <ref>[http://www.insidegnss.com/node/3510 Japan Awards Contracts for QZSS Space, Ground Segments, March 2013]</ref>.

	==Notes==		==Notes==

Teresa.Ferreira at 21:55, 30 April 2013

2013-04-30T21:55:11Z

← Older revision		Revision as of 21:55, 30 April 2013
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	In 2011 the Government of Japan has decided to accelerate the QZSS deployment in order to reach a 4-satellite constellation by the late 2010s, while aiming at a final 7-satellite constellation in the future<ref>[http://www.oosa.unvienna.org/pdf/sap/2012/un-latvia/ppt/1-3.pdf\|Future Plan of QZSS, 2012]</ref>.		In 2011 the Government of Japan has decided to accelerate the QZSS deployment in order to reach a 4-satellite constellation by the late 2010s, while aiming at a final 7-satellite constellation in the future<ref>[http://www.oosa.unvienna.org/pdf/sap/2012/un-latvia/ppt/1-3.pdf\|Future Plan of QZSS, 2012]</ref>.

	Later on March 2013, the Japanese Cabinet Office has formally announced a ¥50 billion (US$540 million) contract award with Mitsubishi to build one geostationary satellite and two additional quasi-zenith satellites (QZSs). The three satellites are scheduled to be launched before the end of 2017. In addition was also signed another contract with a special purpose company (led by NEC and supported by Mitsubishi UFJ Lease & Finance and Mitsubishi Electric Corporation) to fund the design and construction of the ground control system as well it's verification and maintenance for a period of 15 years. <ref>[http://www.insidegnss.com/node/3510\|Japan Awards Contracts for QZSS Space, Ground Segments, March 2013]</ref>.		Later on March 2013, the Japanese Cabinet Office has formally announced a ¥50 billion (US$540 million) contract award with Mitsubishi to build one geostationary satellite and two additional quasi-zenith satellites (QZSs). The three satellites are scheduled to be launched before the end of 2017. In addition was also signed another contract with a special purpose company (led by NEC and supported by Mitsubishi UFJ Lease & Finance and Mitsubishi Electric Corporation) to fund the design and construction of the ground control system as well it's verification and maintenance for a period of 15 years. <ref>[http://www.insidegnss.com/node/3510\| Japan Awards Contracts for QZSS Space, Ground Segments, March 2013]</ref>.

	==Notes==		==Notes==

Filipe.Pelica: /* QZSS Development */

2013-04-30T17:59:59Z

QZSS Development

← Older revision		Revision as of 17:59, 30 April 2013
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	In 2011 the Government of Japan has decided to accelerate the QZSS deployment in order to reach a 4-satellite constellation by the late 2010s, while aiming at a final 7-satellite constellation in the future<ref>[http://www.oosa.unvienna.org/pdf/sap/2012/un-latvia/ppt/1-3.pdf\|Future Plan of QZSS, 2012]</ref>.		In 2011 the Government of Japan has decided to accelerate the QZSS deployment in order to reach a 4-satellite constellation by the late 2010s, while aiming at a final 7-satellite constellation in the future<ref>[http://www.oosa.unvienna.org/pdf/sap/2012/un-latvia/ppt/1-3.pdf\|Future Plan of QZSS, 2012]</ref>.

			Later on March 2013, the Japanese Cabinet Office has formally announced a ¥50 billion (US$540 million) contract award with Mitsubishi to build one geostationary satellite and two additional quasi-zenith satellites (QZSs). The three satellites are scheduled to be launched before the end of 2017. In addition was also signed another contract with a special purpose company (led by NEC and supported by Mitsubishi UFJ Lease & Finance and Mitsubishi Electric Corporation) to fund the design and construction of the ground control system as well it's verification and maintenance for a period of 15 years. <ref>[http://www.insidegnss.com/node/3510\|Japan Awards Contracts for QZSS Space, Ground Segments, March 2013]</ref>.

	==Notes==		==Notes==