From: navigaiter2002@aol.comSpamsuX.retro.com   
      
   >1)Lanunch a large super pressure Balloon and teather it to the ground.   
      
   Too expensive for CATS. Super pressure envelopes are tres exotique. Why not go   
   with cheap zero pressure envelopes and have a buoyancy-adjusting lift gas   
   system which can compensate for temperature/lift-gas-volume changes?   
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