Michiel,
 
Mv> If it goes from the west to east after sundown
Mv> or from east to west before sunrise, you see it as a bright light that
Mv> quite suddenly "turns off" when it enters the earth's shadow.
 
Hmmm ... I'm lost here ... IMO the ISS _never_ goes from east to west.
 
http://spaceflight.nasa.gov/realdata/tracking/index.html
 
 
 \%/{at}rd

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