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The MTSAT Satellite Augmentation System ([[MSAS General Introduction|MSAS]]) is the Japanese [[SBAS General Introduction|Satellite Based Augmentation System (SBAS)]] System:<ref name="MSAS_STATUS_2007">[http://www.unoosa.org/ 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.
First tests were accomplished successfully, and MSAS system for aviation use was declared operational in September 27, 2007,<ref name="MSAS_STATUS_2007_2">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/surveyperspectives-late-april-2008-7289 Eric Gakstatter, Perspectives - Late April 2008, GPSworld, April 15, 2008]</ref><ref name=MSAS_WIKI_2>[http://en.wikipedia.org/wiki/Multi-functional_Satellite_Augmentation_System Multi-functional Satellite Augmentation System] in [http://en.wikipedia.org/ Wikipedia]</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.unoosa.org/ Overview of MSAS, Presentation for ICG-3, 2008]</ref>
The SBAS signal used to be transmitted from MTSAT (Multi-functional Transport Satellites) operated by the Ministry of Land, Infrastructure, Transport and Tourism (MLIT). The SBAS signal that is made by MLIT is now transmitted from the QZS-3 GEO satellite using the QZSS SBAS transmission service since April 2020.<ref name=SBASTS>[https://qzss.go.jp/en/overview/services/sv12_sbas.html SBAS Transmission Service]</ref>


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) 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)]. Tests during Initial Operational Phases were accomplished successfully, and MSAS for aviation use was commissioned on September 27, 2007.<ref>[http://en.wikipedia.org/wiki/Multi-functional_Satellite_Augmentation_System MSAS in Wikipedia]</ref>


GPS signals are received at the MSAS Ground Monitor Stations and MSAS Monitor & Ranging Stations. These stations check operational status of GPS, and transmit GPS data to Master Control Stations 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>[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.


==MSAS User Segment==
==MSAS User Segment==


The MSAS user segment is the GPS and SBAS-enabled receiver, which uses the information broadcast from each GPS satellite to determine its location and the current time, and receives the MSAS corrections from the MTSAT satellites. MSAS receivers design is identical to those design for [[Work in Progress:WAAS User Segment|WAAS]]. The different is that besides processing WAAS signals from [[Work in Progress:WAAS Space Segment|WAAS GEO satellites]], they also process the signals from the Japanese MTSAT geo-stationary satellites.
The MSAS user segment is the GPS and SBAS-enabled receiver, which uses the information broadcast from each GPS satellite to determine its location and the current time, and receives the MSAS corrections from the MTSAT satellites. MSAS receivers design is identical to [[WAAS User Segment|those designed for WAAS]]. Please refer to the article [[WAAS Receivers|WAAS Receivers]] as well.


MSAS user equipment for civil aviation (Safety-of-Life service) shall be compliant (certified) against several standards, i.e. RTCA MOPS DO 229  (see article [[SBAS Standards]]).
MSAS user equipment for civil aviation shall be compliant (certified) against several standards, e.g. RTCA MOPS DO 229  (see article [[SBAS Standards]]).


==Notes==
==Notes==

Latest revision as of 10:43, 27 July 2021


MSASMSAS
Title MSAS User Segment
Edited by 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.

First tests were accomplished successfully, and MSAS system for aviation use was declared operational in September 27, 2007,[2][3][4] providing a service of horizontal guidance for En-route through Non-Precision Approach.[1][2][5]

The SBAS signal used to be transmitted from MTSAT (Multi-functional Transport Satellites) operated by the Ministry of Land, Infrastructure, Transport and Tourism (MLIT). The SBAS signal that is made by MLIT is now transmitted from the QZS-3 GEO satellite using the QZSS SBAS transmission service since April 2020.[6]


MSAS User Segment

The MSAS user segment is the GPS and SBAS-enabled receiver, which uses the information broadcast from each GPS satellite to determine its location and the current time, and receives the MSAS corrections from the MTSAT satellites. MSAS receivers design is identical to those designed for WAAS. Please refer to the article WAAS Receivers as well.

MSAS user equipment for civil aviation shall be compliant (certified) against several standards, e.g. RTCA MOPS DO 229 (see article SBAS Standards).

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. ^ Multi-functional Satellite Augmentation System in Wikipedia
  5. ^ Overview of MSAS, Presentation for ICG-3, 2008
  6. ^ SBAS Transmission Service
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