Re: Solar transit: satellite?

From: Don Ledger (dledger@ns.sympatico.ca)
Date: Mon Mar 17 2003 - 15:51:59 EST

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    The usual "weather" balloons are constructed to burst into many 
    pieces due to freezing up at levels at ~40,000 feet. They 
    fragment so as not to be of size or area to cause havoc in the 
    air [jet injestion] on the ground [falling across a windshield 
    in heavy traffic] or in the ocean [i.e. whales eating them]. 
    They are 1.5 meters in diameter. Sometimes however they get 
    trapped between fast moving layers of air and travel well away 
    from their intended area of concern.
    
    Don Ledger
    
    thomsona wrote:
    >>I have seen mylar and rubber balloons drifting off from shopping centers
    > 
    > and
    > 
    >>other places where that is likely to happen. Then again, at some weddings
    >>(and other events) rubber balloons are released enmasse.
    > 
    > 
    > I wonder how many balloons are floating around at any given time. There's
    > currently a metallized mylar Valentine balloon anchored to our breakfast
    > table that shows no sign of giving out after a month. Doubtless solar UV
    > would cut down the lifetime of those floating in the open air, but still, I
    > bet there are a lot out there that are a source of noise for satellite and
    > astronomical observations.
    > 
    > 
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