INMARSAT SATELLITE FREQUENCIES TRIAL VSAT SERVICES

Only a small portion (1.3-1.7GHz) of L-Band is allocated to satellite communications on Inmarsat. Using standard tactical radios and field-proven kits from Spectra Group (UK) Limited (SlingShotВ®), L-TAC enables users to operate secure voice and data. Provides high-speed connectivity.L-Band (1-2 GHz)Being a relatively low frequency, L-band is easier to process, requiring less sophisticated and less expensive RF equipment, and due to a wider beam width, the pointing accuracy of the antenna does not have to be as accurate as the higher bands.InmarsatвЂ™s award-winning L-TAC (L-band Tactical Satellite) service offers global, satellite-based, beyond line of sight (BLOS) communications on the move (COTM) for Ultra High Frequency (UHF) and Very High Frequency (VHF) radio users. Designed using broadband technology. Due to Inmarsat satellite terminal FleetBroadBand JUE-500 - is a compact ship earth station for operation in various courts. The compact and rugged Intellian GX60 is a 60cm Ka-Band marine satellite communications antenna system thats fully optimized and completely certified to work with Inmarsats Global Xpress GX satellite service, as well as all other high throughput Ka-Band maritime satellite internet platforms.

VSAT Vessels moving from region to region need to change satellite beams, sometimes with no coverage in between beams. This can be overcome by transmitting extra power but this of course comes with a cost as well.The pointing accuracy of the antennas need to be much tighter than L-Band Inmarsat terminals, due to narrower beam widths, and consequently the terminals need to be more precise and more expensive.Ku band coverage is generally by regional spot beams, covering major land areas with TV reception. The wavelength of rain drops coincides with the wavelength of Ku-Band causing the signal to be attenuated during rain showers. Other than a mention of K-Band radar thereВ are few references on the Internet to it's use.Ku-Band is most commonly used forВ satellite TV and is used for mostВ VSATВ systems on yachts and ships today.В There is much more bandwidth available in Ku -Band and it is therefore less expensive that C or L-band.The main disadvantage of Ku-Band is rain fade.

Inmarsat Satellite Frequencies Trial VSAT Services

It is also used today for terrestrial VSAT services from companies like Hughes Networks.Ka-Band bandwidth is plentiful and once implemented should be quite inexpensive compared to Ku-Band. It is commonly usedВ for high definition satellite TV. Like Ku-band it is susceptible to rain fade.

It will be difficult for smaller companies to compete with the expected $1.4M investment that Inmarsat is making in it's I5 satellites. If priced correctly, this could revolutionize the marine VSAT industry. As more Ka-Band bandwidth becomes available, there will be several other satellite providers offering Ka-Band VSAT on a more regional basis.The advantage of the Inmarsat solution is that itВ will be global, seamless, much smaller antennas,В and should be much cheaper that Ku-Band services today.