Information about Quasi Zenith Satellite System
The Quasi-Zenith Satellite System (QZSS), is a proposed three-satellite regional time transfer system and enhancement for GPS covering Japan. The first satellite is scheduled to be launced in 2008.[1]
Authorized by the Japanese government in 2002, work on a concept for a Quasi-Zenith Satellite System (QZSS), or Jun-Ten-Cho in Japanese, has been developed by the Advanced Space Business Corporation (ASBC) team, including Mitsubishi Electric Corp., Hitachi Ltd., and GNSS Technologies Inc.
QZSS is targeted at mobile applications, to provide communications-based services (video, audio, and data) and positioning information. With regards to its positioning service, QZSS can only provide limited accuracy on its own and as is not currently required in its specifications to work in a stand-alone mode. As such, it is viewed as a GNSS Augmentation service. Its positioning service could also can be collaborate with the geostationary satellites in Japan's MTSAT Satellite-based Augmentation System (MSAS) (currently under development), which itself is a Satellite Based Augmentation System similar to the U.S. Federal Aviation Administration's Wide Area Augmentation System (WAAS)
The satellites would be placed in a periodical Highly Elliptical Orbit (HEO). These orbits allow the satellite to dwell for more than 12 hours a day with an elevation above 70° (meaning they appear almost overhead most of the time) and gives rise to the term "quasi-zenith" for which the system is named. Similar orbits are used by the Sirius Satellite Radio system. As of June 2003, the proposed orbits ranged from 45° inclination with little eccentricity, to 53° with significant eccentricity.
Inclination in general is the angle between a reference plane and another plane or axis of direction.
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Authorized by the Japanese government in 2002, work on a concept for a Quasi-Zenith Satellite System (QZSS), or Jun-Ten-Cho in Japanese, has been developed by the Advanced Space Business Corporation (ASBC) team, including Mitsubishi Electric Corp., Hitachi Ltd., and GNSS Technologies Inc.
QZSS is targeted at mobile applications, to provide communications-based services (video, audio, and data) and positioning information. With regards to its positioning service, QZSS can only provide limited accuracy on its own and as is not currently required in its specifications to work in a stand-alone mode. As such, it is viewed as a GNSS Augmentation service. Its positioning service could also can be collaborate with the geostationary satellites in Japan's MTSAT Satellite-based Augmentation System (MSAS) (currently under development), which itself is a Satellite Based Augmentation System similar to the U.S. Federal Aviation Administration's Wide Area Augmentation System (WAAS)
The satellites would be placed in a periodical Highly Elliptical Orbit (HEO). These orbits allow the satellite to dwell for more than 12 hours a day with an elevation above 70° (meaning they appear almost overhead most of the time) and gives rise to the term "quasi-zenith" for which the system is named. Similar orbits are used by the Sirius Satellite Radio system. As of June 2003, the proposed orbits ranged from 45° inclination with little eccentricity, to 53° with significant eccentricity.
See also
- Global Navigation Satellite System (GNSS)
- Global Positioning System (GPS)
- Multi-Functional Transport Satellite (MTSAT)
- Multi-functional Satellite Augmentation System (MSAS)
References
- Petrovski, Ivan G. QZSS - Japan's New Integrated Communication and Positioning Service for Mobile Users. GPS World Online. June 01, 2003.
- High Accuracy Positioning Experiment System Using Quasi-Zenith Satellites System (JAXA) (Japanese) http://qzss.jaxa.jp
Satellite navigation systems | |
|---|---|
| Historical | Transit |
| Operational | ){kind=small} / GLONASS GPS |
| Developmental | ){kind=small} Beidou/COMPASS ){kind=small} Galileo IRNSS ){kind=small} QZSS |
| Related topics | EGNOS GAGAN GPSC LAAS MSAS WAAS |
Time transfer describes methods for transferring reference clock synchronization from one point to another, often over long distances. Radio-based navigation systems are frequently used as time transfer systems.
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Global Positioning System (GPS) is the only fully functional Global Navigation Satellite System (GNSS). Utilizing a constellation of at least 24 medium Earth orbit satellites that transmit precise microwave signals, the system enables a GPS receiver to determine its
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This article or section contains information about scheduled or expected future events.
It may contain tentative information; the content may change as the event approaches and more information becomes available.
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It may contain tentative information; the content may change as the event approaches and more information becomes available.
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Augmentation of a Global Navigation Satellite System (GNSS) or Blended navigation is a method of improving the navigation system's attributes, such as accuracy, reliability, and availability, through the integration of external information into the calculation process.
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The Wide Area Augmentation System (WAAS) is an elevated-accuracy navigation system developed for civil aviation by the Federal Aviation Administration (FAA), a division of the United States Department of Transportation (DOT).
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Highly Elliptical Orbit (HEO) is an elliptic orbit characterized by a relatively low-altitude perigee and an extremely high-altitude apogee. These extremely elongated orbits can have the advantage of long dwell times at a point in the sky during the approach to and descent from
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For the science fiction novella by William Shunn, see .
Inclination in general is the angle between a reference plane and another plane or axis of direction.
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Eccentricity may refer to:
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- Eccentricity (behavior), unusual or odd behavior on the part of a person, as opposed to being "normal"
- Eccentricity (mathematics), a parameter associated with every conic section
- Eccentricity vector
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Global Navigation Satellite System (GNSS) is the standard generic term for satellite navigation systems that provide autonomous geo-spatial positioning with global coverage.
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Global Positioning System (GPS) is the only fully functional Global Navigation Satellite System (GNSS). Utilizing a constellation of at least 24 medium Earth orbit satellites that transmit precise microwave signals, the system enables a GPS receiver to determine its
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MTSAT are a series of weather and aviation control satellites. They are geostationary satellites. They are owned and operated by the Japanese Ministry of Land, Infrastructure and Transport and the Japan Meteorological Agency (JMA), and provide coverage for the hemisphere centred on
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Multi-functional Satellite Augmentation System (MSAS) is a Japanese SBAS (Satellite Based Augmentation System), i.e. a satellite navigation system which supports Differential GPS (DGPS) designed to supplement the GPS system by reporting (then improving) on the reliability and
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Global Navigation Satellite System (GNSS) is the standard generic term for satellite navigation systems that provide autonomous geo-spatial positioning with global coverage.
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The TRANSIT system, also known as NAVSAT (for Navy Navigation Satellite System), was the first satellite navigation system to be used operationally.
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GLONASS (Russian: ГЛОНАСС - ГЛОбальная НАвигационная
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Global Positioning System (GPS) is the only fully functional Global Navigation Satellite System (GNSS). Utilizing a constellation of at least 24 medium Earth orbit satellites that transmit precise microwave signals, the system enables a GPS receiver to determine its
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Beidou Navigation System (Simplified Chinese: 北斗导航系统; pinyin: běidǒu dǎoháng xìtǒng) or Beidou Satellite Navigation and Positioning System
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The COMPASS system (also known as Beidou-2) is a project by China to develop an independent satellite navigation system. The current Beidou-1 system (made up of 4 satellites) is experimental and has limited coverage and application.
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This article contains information about a scheduled or expected .
It may contain preliminary information that does not reflect the final version of the product.
The Galileo positioning system
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It may contain preliminary information that does not reflect the final version of the product.
The Galileo positioning system
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The Indian Regional Navigational Satellite System (IRNSS) is a developmental autonomous regional satellite navigation system that is being constructed[1] and is controlled by the Indian government.
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The European Geostationary Navigation Overlay Service (EGNOS) is a satellite based augmentation system (SBAS) under development by the European Space Agency, the European Commission and EUROCONTROL.
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The GPS Aided Geo Augmented Navigation or GPS and Geo Augmented Navigation system (GAGAN) is a planned implementation of a Satellite Based Augmentation System (SBAS) by the Indian government. (Gagan is the transliteration of a Hindi word that means sky.
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The Local Area Augmentation System (LAAS) is an all-weather aircraft landing system based on real-time differential correction of the GPS signal. Local reference receivers send data to a central location at the airport.
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Multi-functional Satellite Augmentation System (MSAS) is a Japanese SBAS (Satellite Based Augmentation System), i.e. a satellite navigation system which supports Differential GPS (DGPS) designed to supplement the GPS system by reporting (then improving) on the reliability and
..... Click the link for more information.
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The Wide Area Augmentation System (WAAS) is an elevated-accuracy navigation system developed for civil aviation by the Federal Aviation Administration (FAA), a division of the United States Department of Transportation (DOT).
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