I usually keep the 2-meter rig in my shack tuned to 145.8 MHz just in case the space station passes by. It has always been quiet.
A few minutes ago (about 2210Z on 4July), I was sending CQ on the 15M band when the 2-meter rig comes to life with "Any station, any station, this is NA1SS over". I just about had a heart attack! He called twice, I tried to answer twice on the odd split frequency (maybe 144.9 MHz). No response, I tried again on simplex, still no response. Bummer.
I don't know if it was someone yanking my chain. But it sure was exciting. I checked the locator website, and sure enough, the space station was overhead at the time.
oh well, maybe next time....
73, mike AA4N