00306nam a22001217a 4500020001500000040000900015082001800024100001800042245003000060250001700090260004700107650003000154  a9814126545  cNust  a621.3825bPRA  aTimothy Pratt  aSatellite  communications  a2nd Edition   aNew York:bJohn Wiley and sons Inc,c2002.  aSatellite  communications