00322nam a2200133 a 450000500170000002000180001708200180003510000180005324500290007125000120010026000320011230000250014450000190016920251203111700.0  a9780070077850  a621.3825bROD  aRoddy, Dennis  aSatellite communications  a4th ed.  aNew DelhibTatac1996-R2009  axii,652p.c22cm.bPB  aincludes index