World Surveillance Group Inc (fka WSGI)

[sami1327]

This Radio Spectrum is beyond me. SHF is specific to satellite communications but it looks like UHF operates at the satellite level as well. I’m not sure but below GSAT lists their frequency range & to me, it looks like it falls within the UHF range .. but here is a link that does give examples of use for each

http://en.wikipedia.org/wiki/Radio_spectrum

Very high frequency
VHF 8 30–300 MHz
10 m – 1 m FM, television broadcasts and line-of-sight ground-to-aircraft and aircraft-to-aircraft communications. Land Mobile and Maritime Mobile communications, amateur radio, weather radio

Ultra high frequency
UHF 9 300–3000 MHz
1 m – 100 mm Television broadcasts, microwave ovens, microwave devices/communications, radio astronomy, mobile phones, wireless LAN, Bluetooth, ZigBee, GPS and two-way radios such as Land Mobile, FRS and GMRS radios, amateur radio

Super high frequency
SHF 10 3–30 GHz
100 mm – 10 mm Radio astronomy, microwave devices/communications, wireless LAN, most modern radars, communications satellites, satellite television broadcasting, DBS, amateur radio

If you do click on the UHF wording it also says:

Ultra-high frequency (UHF) designates the ITU radio frequency range of electromagnetic waves between 300 MHz and 3 GHz (3,000 MHz), also known as the decimetre band or decimetre wave as the wavelengths range from one to ten decimetres; that is 10 centimetres to 1 metre. Radio waves with frequencies above the UHF band fall into the SHF (super-high frequency) or microwave frequency range. Lower frequency signals fall into the VHF (very high frequency) or lower bands. UHF radio waves propagate mainly by line of sight; they are blocked by hills and large buildings although the transmission through building walls is high enough for indoor reception. They are used for television broadcasting, cordless phones, walkie-talkies, satellite communication, and numerous other applications.


Within GSAT info link on their updated satellites .. this is mentioned:

“Globalstar holds 19.275 MHz of “ancillary terrestrial component” (“ATC”)
spectrum in the Big LEO band at 1610-1617.775 MHz/2483.5-2495 MHz”
http://apps.fcc.gov/ecfs/document/view?id=7021928490

I like that the BiB capabilities has this listed:

“The BiB system can host various payload and communications packages ranging from gimbaled daylight/IR optics packages to cellular and VHF/UHF COMs packages”
http://www.wsgi.com/

With GSAT satellites being described as a “bent pipe” system .. I’m hoping that our LTA platforms could fill that same role .. well, especially when we were told:

"GTC equipment could be flown on a WSGI UAV to provide an aerial satellite replacement capable of providing an entire telecommunications platform in areas struck by natural disaster or countries lacking infrastructure"
http://www.sec.gov/Archives/edgar/data/919742/000114420411042071/v229662_ex99-1.htm

; )