Well I am trying to figure out how to get my signal back...
I have a 1.2m pointed at 82. Seems to work OK at my location (38.9, -104.8). Obviously when Nimiq6 launched, 91 was lost. But signals can't be lost, just weakened right? So I am looking at the minimum sized dish needed to pick up enough of the fringe signal and reflections to lock onto channels. Reading this thread it appears that a 2m dish at unknown location does not work for 91. I am looking at perhaps a 4m or larger dish. Or perhaps a multiple reflector dish, observatory style!
It is hard to get estimates from reading these posts of just binary "it works" and "it doesn't work" at relative locations. But looking at the signal map, it might be darn near impossible without some spectacular array.
I am curious to hear of anyone receiving the signal near the "edge" of reception. What sort of dropoff does the shield have? Hopefully we can gather some numbers for the amount of transmission that reflects out of the shielding or bounces back versus the targeted signals. This should give some power/distance we might be able to extrapolate.
Is there a reason in the encoding that makes a large enough dish incapable of reception? Is there a spec for the maximum amount of phase delay/distortion to get a lock? If it is amplifying signals from multiple sources and bounces/reflections, it is possible the data can't be encoded even with a "signal" received.