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Page 263
... satellites were seriously considered , because the time required for a signal to reach a low - altitude satellite and return to Earth is less than that using a synchronous satellite . ( The effect of transmission time will be discussed ...
... satellites were seriously considered , because the time required for a signal to reach a low - altitude satellite and return to Earth is less than that using a synchronous satellite . ( The effect of transmission time will be discussed ...
Page 265
... satellite Earth stations must be located far from terrestrial microwave terminals , and hence far from cities . Two bands of frequencies , each 500 mega- hertz wide , are used ; 3.7 to 4.2 gigahertz for space - to- Earth , and 5.925 to ...
... satellite Earth stations must be located far from terrestrial microwave terminals , and hence far from cities . Two bands of frequencies , each 500 mega- hertz wide , are used ; 3.7 to 4.2 gigahertz for space - to- Earth , and 5.925 to ...
Page 267
... satellite was successfully launched on March 20 , 1970. Skynet is a British defense satellite system ; two satellites have been launched , one in 1969 and a second in 1970 . The NATO and Skynet satellites are almost identical . They are ...
... satellite was successfully launched on March 20 , 1970. Skynet is a British defense satellite system ; two satellites have been launched , one in 1969 and a second in 1970 . The NATO and Skynet satellites are almost identical . They are ...
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