Search results
Results from the WOW.Com Content Network
171.3°W TDRS-10 (J), GE 2 (174°W) United States NASA: 5 December 2002, Atlas IIA: 171.1°W TDRS-11: United States NASA: 31 January 2013, Atlas V 401: 169.5°W NSS-6: Lockheed Martin A2100AXS: Netherlands SES: Direct broadcasting, video distribution Asia: 17 December 2002 Ariane 44L: Ku-band satellite 167.6°W TDRS-5: United States NASA: 2 ...
F2 propagation (F2-skip) is the reflection of VHF signals off the F2 layer of the ionosphere. The phenomenon is rare compared to other forms of propagation (such as sporadic E propagation , or E-skip) but can reflect signals thousands of miles beyond their intended broadcast area, substantially farther than E-skip.
How satellite internet works. Satellite Internet generally relies on three primary components: a satellite – historically in geostationary orbit (or GEO) but now increasingly in Low Earth orbit (LEO) or Medium Earth orbit MEO) [24] – a number of ground stations known as gateways that relay Internet data to and from the satellite via radio waves (), and further ground stations to serve each ...
The first geostationary satellite was Syncom 3, launched on 19 August 1964, and used for communication across the Pacific starting with television coverage of the 1964 Summer Olympics. Shortly after Syncom 3, Intelsat I, aka Early Bird, was launched on 6 April 1965 and placed in orbit at 28° west longitude. It was the first geostationary ...
Block 1 satellites had UFH and SHF communications. Block 2 satellites, starting with UHF 4, added extremely high frequency package with 11 channels. Block 3 satellites replaced the SFH communications with Ka-band transponders. Block 4 satellite incorporated a digital UHF receiver and two additional UHF channels. [2]
ViaSat-3 is a planned global constellation of three geostationary K a-band communications satellites, the first of which was launched in 2023. [1] Operated by Viasat, Inc., the satellites are intended to provide broadband connectivity with speeds of 100-plus megabits per second to homes, business and enterprise internet users, commercial, government and business aircraft, as well as government ...
This part of the GEO station-keeping is called North-South control. [ 4 ] The East-West control is the control of the orbital period and the eccentricity vector performed by making thruster burns tangential to the orbit.
Principles of geolocation using GPS. Geopositioning is the process of determining or estimating the geographic position of an object or a person. [1] Geopositioning yields a set of geographic coordinates (such as latitude and longitude) in a given map datum.