At 10:40 PM 6/16/04 -0700, Morlock Elloi wrote: > >0.25" glass will cost you 2-2.5 dB.
Perhaps there are speciality glasses or polymer sheets which reduce that loss. >> At sufficiently good mechanical stabilization and gain, you will >> encounter perhaps > >The best way to do this is to mount the narrow-angle dish *and* video camera on >the same mount, then use simple circuitry to superimpose white circle on the >center of the image when signal exceeds some threshold (or vary the size with >signal level.) The results could be startling. Nice idea; the radioastronomers do something like this (cross-band correlation) so they can see what their sources might correspond to.