The demand for satellitesupportedmobilityapplications and services is growingquickly, driven inpart bythe growth inmobile terrestrialcommunications.The ability to communicateor accesstheInternetfromanylocation is becoming anexpectationformany,and a necessity for some.Oneofthe keyattractionsofsuchmobile applications isthattheyprovidecommunications fromalmost anylocationon Earth,often atlocations not possibleor practical toserve by othermeans.Examplesofcommonmobility applicationssupported by satellitesystemsare:
Handheld satellitephonesproviding voice and lowdataratecommunciations;
Tracking systems,providing the locationofvehicles,workers andexplorers in remoteorhostileregions;
Low data rateSCADA4ormachine-to-machine applications, for example tomonitor and
Communications forships,used to supportday-to-dayshipoperationsand safetyrelatedservices;
Communications foraircraft, forexampletoprovidethe air traffic control communicationstoand fromthe pilot inoceanic airspace;
Government communications,on land, sea andin theair;
Backhaul forsmall-cellmobile communication toaircraft, shipsand trains, usedtosupportInternet accessandmobiletelephony for aircraft passengers,crewand passengers onships,and train passengers.
All thesemobile applications areprovided globally,bysatellite systemsoperatingin a varietyoffrequency bands ranging from137MHz to 30GHz, each band having differentcharacteristicswhicharemore suited tosomemobile applicationsthanothers.
Advanced Media/TV Services
Another important useof satellitesystemsisforthe distributionofadvancedmedia services toeveryone,e.g. for broadcasters deliveringvideoservices in digitalor in HighDefinition (HD)or in anyotheradvanced TV formats. Satellite alsoplays a fundamentalrole in carryingvideo content fromallover theworldtothesemedia distribution platforms (contribution links).