What is Inmarsat used for?
The paper points out that the INMARSAT system provides capabilities for immediate alerting from ships to rescue-coordinating centers; for reporting navigational and meteorological information; for search- and-rescue coordination used by ship-earth station-equipped vessels; and for general radio communications.
How do CubeSats communicate?
In L-band, CubeSats can take advantage of legacy communications networks such as Globalstar and Iridium by using network-specific transponders to relay information to and from Earth. These networks remove dependence on dedicated ground station equipment.
Which communication is used in satellite?
A satellite is basically a self-contained communications system with the ability to receive signals from Earth and to retransmit those signals back with the use of a transponder—an integrated receiver and transmitter of radio signals.
What is Inmarsat in satellite communication?
Inmarsat is a British satellite telecommunications company, offering global mobile services. It provides telephone and data services to users worldwide, via portable or mobile terminals which communicate with ground stations through fourteen geostationary telecommunications satellites.
How does satellite communication takes place by using the Inmarsat satellite?
How Inmarsat Satellite Coverage Works? The Inmarsat satellite constellation consists of 13 satellites in a geosynchronous (GEO) orbit approximately 22,000 miles above the earth. The satellites are positioned to transmit radio beams in two global configurations covering the oceans and major land masses.
How the optical communication is used for satellite network?
Satellite communication uses electromagnetic waves as a medium for propagation. Optical communication uses the light rays as a medium of propagation. In satellite communication, satellites as a relay station are used for communication. In optical communication, communication happens via optical fiber.
What frequency do CubeSats use?
A ground station suitable for a CubeSat mission usually operates in the VHF and UHF bands, i.e., 144–146 MHz and 435–438 MHz for the amateur region 1. Missions that require a wider bandwidth to download science data may also operate in the S-band, between 2.40 and 2.45 GHz in the amateur band.
How does a satellite communication work?
Satellites communicate by using radio waves to send signals to the antennas on the Earth. The antennas then capture those signals and process the information coming from those signals.
Where are communication satellites installed?
Most communications satellites are placed in geo-stationary orbits 36000km above the equator, therefore transmitting and receiving earth stations can fix their antenna positions with only minor adjustments being required for small shifts in satellite position or changes in atmospheric propagation conditions.