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    Re: Do stars have fingerprints?
    From: Bill B
    Date: 2017 Jul 25, 14:53 -0400

    On 7/25/2017 11:53 AM, Tom Sult wrote:
    > I think a bigger issue is that if you have clouds with that much
    > vertical development (15 km) it is unlikely a drone or balloon would
    > survive the ascent.
    Whilst we indulge in flight of fantasy, (pun intended) there are other
    realities to consider.
    1. The legal limit for a civilian drone is 400' above ground level. I
    share you concern that any (prop driven) drone would have enough lift in
    the thin air to operate at 42,000 feet, let alone pass thought any
    active thunderstorm unscathed.
    2. Forget the weigh of the line. A tethered balloon rising to that
    height would pass through upper winds, maybe the jet stream, perhaps
    with direction and velocity counter to the surface winds. I suspect
    you'll need more than fishing line if that puppy hits a jet stream!
    If tethered to a blow boat this could far surpass the power of a chute,
    but lack navigational control :-)

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