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  Contrailing aircraft height

Contrailing aircraft height
Image credit: © ChrLzs

Uploader comment: This diagram is in relation to making a comparison to the viewing conditions of Kenneth Arnold when he coined the term flying saucer... the discussion is a thread titled "Can Science Prove 'Alien' UFO'S Don't Exist?", about page 11.

   

 
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ChrLzs
June 18, 2015, 5:13 am
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