XPost: sci.space.history, sci.space.shuttle   
   From: jrfrank@ibm-pc.borg.retro.com   
      
   Pat Flannery  wrote in   
   news:vsjj6ka44jjd41@corp.supernews.com:   
      
   >   
   >   
   > A Hubble Hubble wrote:   
   >   
   >>   
   >> Current plan is to launch the prop module on an ELV when HST is no   
   >> longer able to produce science.   
   >   
   > We should talk to the Russians; a modified Progress could do this job at   
   > fairly low cost.   
      
   Not really. Progress requires a passive docking adapter and passive Kurs   
   navaids on the target vehicle. HST has no docking adapter and no navaids.   
   And as Hubble Hugger pointed out, Progress' terminal approach rate is too   
   fast for a delicate target like HST.   
      
      
   --   
   JRF   
      
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