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Old 06-10-2019, 12:51 PM
Disheavel is offline
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Join Date: Nov 2006
Location: Seattle
Posts: 1,559
I think if allowed two phone calls, you are great.

If limited to one call, I would first determine and set up W-E line and thus N-S line. This would tell you N or S hemisphere. Then I would wait for an international space station flyover and call during that and say exactly when it crosses the north-south line.

The ISS is bright as hell, and covers all temperate areas over the course of a few nights. I think this one call could get you a smaller search window than sunrise and sunset even.