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Education Satellite Technology
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achieved aerospace aircraft altitude amplifier antenna applications areas Astronautics atmosphere band bandwidth benefits broadcast satellite camera capability carrier cent Center channels Communications Satellite cooperation cost coverage Demeter developing countries direct broadcast satellite earth resources satellite earth station economic educational television EDUSAT electronic engineering ESRO ETV stations experiments exploration flight frequency global ground station increase industrial Institute INTELSAT International Astronautical Federation launch measurements meteorological microwave million missions model rocket modulation NASA nations navigation operation optical orbit organization outer space peut possible potential present problems radiation receiver région resolution satellite system schools scientific sensors Session signal solar sounding rocket space activities space law space program space technology spacecraft spectral surface teacher technical techniques telecommunications transmission transmitted transponder tunnel diode United University utilization Vidicon