Use GPS in civil aviation demands higher accuracy and reliability in determining position than a mobile
are can turn to their mobil
These days anyone who wants tofind out exactly where they are can turn to their mobile phones, Phones that pick up signals from orbiting U.S. Gopal Positioning System (GPS) satellites are now commonplace. The phone uses that information to work out the location oand display it on a map.
In a similar fashion, the GPS signals can be used to assist aircraft during take off and land as well as in flying shorter routes to their destination.
But as there can be hundreds of passengers in a single aircraft, the use of GPS for such purposes in civil aviation demands higher accuracy in determing position than a mobile phone user would need as well as greater reliability in doing so.
One important way to meet the demands way to meet the demands of civeil aviation has been through what is known as a Satellite-Based Augmentation System (SBAS). Satilightes in geostationary orbit where they match the earth's rotation and therefore remain over the same place onthe globe, are used to supplement the GPSsignals.
The first such SBAS was the U.S Wide Aarea Aurgmentation System (WAAS) That became operational in 2003. The European Geostationary Navigation Overlay Service (EGNOS) began
woking in Oct2009 but was offcially declared available for aviation use only in March this year.
The Japanese have a system known by the acronym MSAS.
India is establishing its own system, the GPS Aided Geo Agmented NAVIGATION(GAGAN) a joint effort by the Indian Space Research Organisation and the Airports Authority of India.
The ground segment for GAGAN which has been put up by the U.S company Raytheon, has 15 reference stations scattered across the country. two mission control centres, along with associated uplink stations, have been setup at Kundalahalli in Bangalore. One more control centre and uplink station are to come up at Delhi.
The spece component for it will become available after the GAGAN payload on the GSAT-8
communication satellite, which was launched recently, is switched on. This payload was also on the GSAT-4 satellite that was lost when the geosynchronous Satellite launch Vehicle (GSLV) failed during launch in Aprill 2010. Two more satellites carrying the same payload are to be launched in the coming years.
SPACE SOJOURN:-India's GSAT-8 satellite being checked prior to launch from the European spaceport at French Guiana in South America.
are can turn to their mobil These days anyone who wants tofind out exactly where they are can turn to their mobile phones, Phones that pick up signals from orbiting U.S. Gopal Positioning System (GPS) satellites are now commonplace. The phone uses that information to work out the location oand display it on a map.
In a similar fashion, the GPS signals can be used to assist aircraft during take off and land as well as in flying shorter routes to their destination.
But as there can be hundreds of passengers in a single aircraft, the use of GPS for such purposes in civil aviation demands higher accuracy in determing position than a mobile phone user would need as well as greater reliability in doing so.
One important way to meet the demands way to meet the demands of civeil aviation has been through what is known as a Satellite-Based Augmentation System (SBAS). Satilightes in geostationary orbit where they match the earth's rotation and therefore remain over the same place onthe globe, are used to supplement the GPSsignals.
The first such SBAS was the U.S Wide Aarea Aurgmentation System (WAAS) That became operational in 2003. The European Geostationary Navigation Overlay Service (EGNOS) began
woking in Oct2009 but was offcially declared available for aviation use only in March this year.
The Japanese have a system known by the acronym MSAS.
India is establishing its own system, the GPS Aided Geo Agmented NAVIGATION(GAGAN) a joint effort by the Indian Space Research Organisation and the Airports Authority of India.
The ground segment for GAGAN which has been put up by the U.S company Raytheon, has 15 reference stations scattered across the country. two mission control centres, along with associated uplink stations, have been setup at Kundalahalli in Bangalore. One more control centre and uplink station are to come up at Delhi.
The spece component for it will become available after the GAGAN payload on the GSAT-8
communication satellite, which was launched recently, is switched on. This payload was also on the GSAT-4 satellite that was lost when the geosynchronous Satellite launch Vehicle (GSLV) failed during launch in Aprill 2010. Two more satellites carrying the same payload are to be launched in the coming years.
SPACE SOJOURN:-India's GSAT-8 satellite being checked prior to launch from the European spaceport at French Guiana in South America.
