On the evening 5th of August 2009, there was a reflection bow observed at city of Lahti. Marja Wallin saw and photographed a small fragment of reflection primary bow.
For the moment, the precise location of sun ray reflection is not yet analysed... To see her other rainbow photos for same evening, look at here.
Update (11th Aug 2009):
There is another gallery existing of the reflection rainbow, in same date and location, taken by Sami Luoma-Pukkila.
image (c) Marja Wallin