00389nam a2200145 a 450000500170000002000150001708200180003210000250005024500490007525000120012426000390013630000210017570000250019670000220022120251203110731.0  a8129701413  a621.3825bPRJ  aPritchard, Wilbur L.  aSatellite Communications Systems Engineering  a2nd ed.  aNew DelhibPearson Educationc1993  a567p.c26 cm. PB  aSuyderhoud, Henri G.  aNelson, Robert A.