Originally Posted By: rafowell
Here are videos I made of the mirror flashes from my 3"x5" glass mirror at ranges of 0.7, 11.1 and 43 miles: http://www.youtube.com/watch?v=GwCbgQGmID4

That is great video you shot. Thanks for it. I am also interested in signaling technology and want to do some tests in the near future.
One thing with these tests that concerns me a little bit is how not to attract unwanted attention and start search and rescue operation smile. I guess one ought not to flash 3x etc.