If you wish to contribute or participate in the discussions about articles you are invited to contact the Editor

MSAS Space Segment: Difference between revisions

From Navipedia
Jump to navigation Jump to search
No edit summary
No edit summary
Line 8: Line 8:
}}
}}


The Multi-functional Satellite Augmentation System (MSAS) is the Japanese [[SBAS General Introduction|SBAS]] System: a GPS Augmentation system with the goal of improving its accuracy, integrity, and availability, and that uses the Multifunctional Transport Satellites (MTSAT).  Tests during Initial Operational Phase were accomplished successfully, and MSAS for aviation use was declared operational on September 27, 2007.<ref name="MSASWiki">[http://en.wikipedia.org/wiki/Multi-functional_Satellite_Augmentation_System MSAS in Wikipedia]</ref>


GPS signals are received at the MSAS Ground Monitor Stations (GMS) and MSAS Monitor & Ranging Stations. These stations check operational status of GPS, and transmit GPS data to Master Control Stations (MCS) that analyze GPS error and ionospheric delay. Then, these Master stations compute Augmentation information and broadcast it to GEO MTSAT (Multi-functional Transport Satellite)<ref name="MTSATWiki">[http://en.wikipedia.org/wiki/Multi-Functional_Transport_Satellite MTSAT in Wikipedia]</ref> satellites. Those satellites, MTSAT, rebroadcast the correction messages back to Earth, where MSAS-enabled GPS receivers use the MSAS corrections to compute a reliable and accurate position.
The MTSAT Satellite Augmentation System ([[Work in Progress:MSAS General Introduction|MSAS]]) is the Japanese [[SBAS General Introduction|Satellite Based Augmentation System (SBAS)]] System:<ref name="MSAS_STATUS_2007">[http://www.oosa.unvienna.org/pdf/icg/2007/icg2/presentations/04_01.pdf MSAS Current Status, Japan Civil Aviation Bureau,] [http://www.oosa.unvienna.org/oosa/SAP/gnss/icg/icg02/presentations.html Second Meeting of the International Committee on Global Navigation Satellite Systems (ICG) organized by the International Space Research Organization,  Bangalore, India , 5 - 7 September 2007]</ref> a GPS Augmentation system with the goal of improving its accuracy, integrity, and availability, and that uses the Multifunctional Transport Satellites (MTSAT) owned and operated by the [http://www.mlit.go.jp Japanese Ministry of Land, Infrastructure and Transport] and the [http://www.jma.go.jp Japan Meteorological Agency (JMA).]
First tests were accomplished successfully, and MSAS system for aviation use was declared operational in September 27, 2007,<ref name="MSAS_STATUS_2007_2">[http://www.navcen.uscg.gov/pdf/cgsicMeetings/47/%5B24%5Dqzzmsas.pdf QZSS / MSAS Status,] CGSIC –47th Meeting ,Fort Worth, Texas September25, 2007, Satoshi KOGURE, [http://www.jaxa.jp/index_e.html Japan Aerospace Exploration Agency,] QZSS Project Team</ref><ref name="MSAS_GPSW">[http://www.gpsworld.com/survey/perspectives-late-april-2008-7289 Eric Gakstatter, Perspectives - Late April 2008, GPSworld, April 15, 2008]</ref> providing a service of horizontal guidance for En-route through Non-Precision Approach.<ref name="MSAS_STATUS_2007"/><ref name="MSAS_STATUS_2007_2"/><ref name="MSAS_STATUS_2008">[http://www.oosa.unvienna.org/pdf/icg/2008/icg3/08-1.pdf Overview of MSAS, Presentation for ICG-3, 2008]</ref>
 


==MSAS Space Segment==
==MSAS Space Segment==


The space segment consists of two geosynchronous communication satellites (GEO): the '''Multifunctional Transport Satellites (MTSAT)''', with navigation payloads which broadcast the correction messages generated by the Master Stations for reception by the User segment. These two satellites are not only devoted to navigation, but also to meteorological/weather purposes.  
The space segment consists of two geosynchronous communication satellites (GEO): the '''Multifunctional Transport Satellites (MTSAT)''', with navigation payloads which broadcast the correction messages generated by the Master Control Stations for reception by the users.<ref name="MSAS_STATUS_2008"/> These two satellites are not only devoted to navigation, but also to meteorological/weather purposes.  
[[File:MTSAT-1.jpg|thumb|250px|MTSAT-1 GEO satellite]]
[[File:MTSAT-1.jpg|thumb|250px|MTSAT-1 GEO satellite]]


MTSAT are owned and operated by the [http://www.mlit.go.jp Japanese Ministry of Land, Infrastructure and Transport] and the [http://www.jma.go.jp Japan Meteorological Agency (JMA)], and provide coverage for the hemisphere centred on 140° East (including Japan and Australia, the main users of the MTSAT images). Besides being the Space Segment of the Japanese MSAS Augmentation system, the MTSAT satellites provide imagery in five wavelenght bands for weather functions.   
MTSAT are owned and operated by the [http://www.mlit.go.jp Japanese Ministry of Land, Infrastructure and Transport] and the [http://www.jma.go.jp Japan Meteorological Agency (JMA),]<ref name="MTSAT">[http://www.jma.go.jp/jma/jma-eng/satellite/about_mt_index.html MTSAT and its System], Satellite Program Division, [[http://www.jma.go.jpJapan Meteorological Agency]</ref> and provide coverage for the hemisphere centred on 140° East (including Japan and Australia, the main users of the MTSAT images). Besides being the Space Segment of the Japanese MSAS Augmentation system, the MTSAT satellites provide imagery in five wavelenght bands for weather functions.   


MTSAT-1R (also known as Himawari 6) was successfully launched on a H-IIA on February 26, 2005. It was built by [http://www.ssloral.com/ Space Systems/Loral].  
MTSAT-1R (also known as Himawari 6) was successfully launched on a H-IIA on February 26, 2005. It was built by [http://www.ssloral.com/ Space Systems/Loral].  
MTSAT-2 (also known as Himawari 7) was built by [http://www.mitsubishielectric.com/ Mitsubishi] and successfully put in orbit on February 18, 2006. Their lifespan is planned of five years<ref name="MTSATWiki"/>. Both satellites, MTSAT-1R and MTSAT-2, are controlled by Kobe MCS station and Hitachiota MCS, respectively. The main characteristics of MTSAT satellites are shown in next table (''table taken from [http://en.wikipedia.org/wiki/Multi-functional_Satellite_Augmentation_System MSAS article in Wikipedia]''):<ref name="MSASWiki"/>
MTSAT-2 (also known as Himawari 7) was built by [http://www.mitsubishielectric.com/ Mitsubishi] and successfully put in orbit on February 18, 2006. Their lifespan is planned of five years.<ref name="MTSATWiki">[http://en.wikipedia.org/wiki/Multi-Functional_Transport_Satellite MTSAT in Wikipedia]</ref> Both satellites, MTSAT-1R and MTSAT-2, are controlled by Kobe MCS station and Hitachiota MCS, respectively. The main characteristics of MTSAT satellites are shown in next table (''table taken from [http://en.wikipedia.org/wiki/Multi-functional_Satellite_Augmentation_System MSAS article in Wikipedia]''):<ref name="MSASWiki">[http://en.wikipedia.org/wiki/Multi-functional_Satellite_Augmentation_System MSAS in Wikipedia]</ref>
 




Revision as of 07:08, 2 August 2011


MSASMSAS
Title MSAS Space Segment
Author(s) GMV.
Level Basic
Year of Publication 2011
Logo GMV.png


The MTSAT Satellite Augmentation System (MSAS) is the Japanese Satellite Based Augmentation System (SBAS) System:[1] a GPS Augmentation system with the goal of improving its accuracy, integrity, and availability, and that uses the Multifunctional Transport Satellites (MTSAT) owned and operated by the Japanese Ministry of Land, Infrastructure and Transport and the Japan Meteorological Agency (JMA).

First tests were accomplished successfully, and MSAS system for aviation use was declared operational in September 27, 2007,[2][3] providing a service of horizontal guidance for En-route through Non-Precision Approach.[1][2][4]


MSAS Space Segment

The space segment consists of two geosynchronous communication satellites (GEO): the Multifunctional Transport Satellites (MTSAT), with navigation payloads which broadcast the correction messages generated by the Master Control Stations for reception by the users.[4] These two satellites are not only devoted to navigation, but also to meteorological/weather purposes.

MTSAT-1 GEO satellite

MTSAT are owned and operated by the Japanese Ministry of Land, Infrastructure and Transport and the Japan Meteorological Agency (JMA),[5] and provide coverage for the hemisphere centred on 140° East (including Japan and Australia, the main users of the MTSAT images). Besides being the Space Segment of the Japanese MSAS Augmentation system, the MTSAT satellites provide imagery in five wavelenght bands for weather functions.

MTSAT-1R (also known as Himawari 6) was successfully launched on a H-IIA on February 26, 2005. It was built by Space Systems/Loral. MTSAT-2 (also known as Himawari 7) was built by Mitsubishi and successfully put in orbit on February 18, 2006. Their lifespan is planned of five years.[6] Both satellites, MTSAT-1R and MTSAT-2, are controlled by Kobe MCS station and Hitachiota MCS, respectively. The main characteristics of MTSAT satellites are shown in next table (table taken from MSAS article in Wikipedia):[7]


Satellite Name & Details NMEA / PRN Location
MTSAT-1R NMEA #42 / PRN #129 140°E
MTSAT-2 NMEA #50 / PRN #137 145°E

Notes

References

  1. ^ a b MSAS Current Status, Japan Civil Aviation Bureau, Second Meeting of the International Committee on Global Navigation Satellite Systems (ICG) organized by the International Space Research Organization, Bangalore, India , 5 - 7 September 2007
  2. ^ a b QZSS / MSAS Status, CGSIC –47th Meeting ,Fort Worth, Texas September25, 2007, Satoshi KOGURE, Japan Aerospace Exploration Agency, QZSS Project Team
  3. ^ Eric Gakstatter, Perspectives - Late April 2008, GPSworld, April 15, 2008
  4. ^ a b Overview of MSAS, Presentation for ICG-3, 2008
  5. ^ MTSAT and its System, Satellite Program Division, [Meteorological Agency
  6. ^ MTSAT in Wikipedia
  7. ^ MSAS in Wikipedia
Retrieved from "https://gssc.esa.int/navipedia/index.php?title=MSAS_Space_Segment&oldid=7630"