Sever - definição. O que é Sever. Significado, conceito
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O que (quem) é Sever - definição

METHOD OF COMMUNICATING WITH MICROWAVE RADIO SIGNALS OVER CONSIDERABLE DISTANCES
Troposcatter; SEVER; BACK PORCH; IWCS; Tropo-scatter; Tropospheric scattering; Tropospheric scatter link
  • 90px
  • Belarusian "Horizon" mobile tropospheric scatter communication system
  • Pacific Scatter System
  • US Army TRC-170 Tropo Scatter Microwave System
  • Pole Vault used circular parabolic antennas, later systems generally used squared-off versions sometimes known as "billboards".
  • India-USSR troposcatter UHF link on a 1982 stamp of India
  • line of sight]] limitation.
  • Boswell Bay, Alaska]] White Alice Site, Tropospheric scatter antenna and feeder.

Sever         
WIKIMEDIA DISAMBIGUATION PAGE
Sever (disambiguation)
·vi To make a separation or distinction; to Distinguish.
II. Sever ·vt To keep distinct or apart; to Except; to Exempt.
III. Sever ·vt To cut or break open or apart; to divide into parts; to cut through; to Disjoin; as, to sever the arm or leg.
IV. Sever ·vi To suffer disjunction; to be parted, or rent asunder; to be separated; to Part; to Separate.
V. Sever ·vt To Disunite; to Disconnect; to Terminate; as, to sever an estate in joint tenancy.
VI. Sever ·vt To separate, as one from another; to cut off from something; to Divide; to part in any way, especially by violence, as by cutting, rending, ·etc.; as, to sever the head from the body.
sever         
WIKIMEDIA DISAMBIGUATION PAGE
Sever (disambiguation)
(severs, severing, severed)
1.
To sever something means to cut completely through it or to cut it completely off. (FORMAL)
Richardson severed his right foot in a motorbike accident.
...oil still gushing from a severed fuel line.
VERB: V n, V-ed
2.
If you sever a relationship or connection that you have with someone, you end it suddenly and completely. (FORMAL)
She severed her ties with England...
VERB: V n
sever         
WIKIMEDIA DISAMBIGUATION PAGE
Sever (disambiguation)
¦ verb
1. divide by cutting or slicing.
2. put an end to (a connection or relationship).
Derivatives
severable adjective
Origin
ME: from Anglo-Norman Fr. severer, from L. separare 'disjoin, divide'.

Wikipédia

Tropospheric scatter

Tropospheric scatter, also known as troposcatter, is a method of communicating with microwave radio signals over considerable distances – often up to 500 kilometres (310 mi) and further depending on frequency of operation, equipment type, terrain, and climate factors. This method of propagation uses the tropospheric scatter phenomenon, where radio waves at UHF and SHF frequencies are randomly scattered as they pass through the upper layers of the troposphere. Radio signals are transmitted in a narrow beam aimed just above the horizon in the direction of the receiver station. As the signals pass through the troposphere, some of the energy is scattered back toward the Earth, allowing the receiver station to pick up the signal.

Normally, signals in the microwave frequency range travel in straight lines, and so are limited to line-of-sight applications, in which the receiver can be 'seen' by the transmitter. Communication distances are limited by the visual horizon to around 48–64 kilometres (30–40 mi). Troposcatter allows microwave communication beyond the horizon. It was developed in the 1950s and used for military communications until communications satellites largely replaced it in the 1970s.

Because the troposphere is turbulent and has a high proportion of moisture, the tropospheric scatter radio signals are refracted and consequently only a tiny proportion of the transmitted radio energy is collected by the receiving antennas. Frequencies of transmission around 2 GHz are best suited for tropospheric scatter systems as at this frequency the wavelength of the signal interacts well with the moist, turbulent areas of the troposphere, improving signal-to-noise ratios.

Exemplos do corpo de texto para Sever
1. It is demanding that Syria sever relations with Iran.
2. Israel was considering to sever contacts with the Palestinian Authority.
3. Sever cold wave conditions prevailed in north Madhya Maharashtra and parts of Marathwada and Vidarbha.
4. The other bidders are Group Invest, Sever–Zapad Invest, Unitex, gas trader Trans–Nafta and EniNefteGaz. «
5. His dream was to sever its constitutional ties with Papua New Guinea.