The faint red dot is the transmitter at the other side. One can see the beam doesn't point exactly at the dot. Such a misalignment shouldn't normally be on a properly
aimed track, because it contributes to the optical loss and makes the link drop out earlier than necessary.
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{{Information |Description=Artificially enhanced picture of Ronja beam in heavy fog. Ronja didn't work in this fog according to the user testimonial (http://lists.pointless.net/pipermail/ronja/2007-January/009549.html). The original unenhanced picture is