Re: Geostationary Solar Eclipse on Tuesday

From: Bob Christy (
Date: Tue Jan 04 2011 - 16:51:31 UTC

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    The eclipse was detectable on the S-band radio transmission from USA 
    155, an SDS satellite stationed in the geosynchronous belt at 10 degrees 
    west. It reacts to variations in sunlight by drifting in frequency.
    Using the latest five-weeks-old element set from Mike's file, Gerhard 
    Holtkamp predicted (in a private message) an eclipse mid point at 14:25 
    UTC with entry and exit from the penumbral shadow about 25 minutes 
    either side.
    A frequency drift started at 14:03 and ceased at 14:59. It will now take 
    several hours to return to normal.
    The mid-point was 14:31, and the duration was +/-28 minutes.
    Thanks for the 'heads-up' Gerhard.
    Bob Christy
    On 03/01/2011 09:38, Gerhard HOLTKAMP wrote:
    > Clear skies permitting European observers can see two solar eclipses tomorrow
    > (4-JAN-2011).............
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