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
Line 17: Line 17:
[[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 Austrilia, 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. 


They are geostationary satellites 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; this includes Japan and Australia who are the principal users of the satellite imagery that MTSAT provides. They replace the GMS-5 satellite, also known as Himawari 5. They can provide imagery in five wavelength bands — visible and four infrared, including the water vapour channel. The visible light camera has a resolution of 1 km; the infrared cameras have 4 km (resolution is lower away from the equator at 140° East). The spacecraft have a planned lifespan of five years. MTSAT-1 and 1R were built by [http://www.ssloral.com/ Space Systems/Loral]. MTSAT-2 was built by [http://www.mitsubishielectric.com/ Mitsubishi]. <ref>[http://en.wikipedia.org/wiki/Multi-Functional_Transport_Satellite MTSAT in Wikipedia]</ref>  
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 to five years. <ref>[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 (''taken from [http://en.wikipedia.org/wiki/Multi-functional_Satellite_Augmentation_System MSAS article in Wikipedia]''):
MTSAT-1R (also known as Himawari 6) was successfully launched on a H-IIA on February 26, 2005 and became partially operational on June 28, 2005 — the aviation payload was not functional as two MTSATs are required for air traffic control. MTSAT-2 (also known as Himawari 7) successfully launched on February 18, 2006 and is positioned at 145° East. The weather functions of MTSAT-2 were put into hibernation until the end of MTSAT-1R’s life (5 years from launch). The transportation and communication functions of MTSAT-2 will be utilized prior to that time.
 
Both satellites, MTSAT-1R and MTSAT-2, are controlled by Kobe MCS station and Hitachiota MCS, respectively.
 


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

Revision as of 09:45, 27 July 2011


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


The Multi-functional Satellite Augmentation System (MSAS) is the Japanese 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.[1]

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)[2] 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 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.

MTSAT-1 GEO satellite

MTSAT 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 140° East (including Japan and Austrilia, 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 byMitsubishi and successfully put in orbit on February 18, 2006. Their lifespan is planned to five years. [3] 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 (taken from MSAS article in Wikipedia):

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. ^ MSAS in Wikipedia
  2. ^ MTSAT in Wikipedia
  3. ^ MTSAT in Wikipedia
Retrieved from "https://gssc.esa.int/navipedia/index.php?title=MSAS_Space_Segment&oldid=7309"