Hi Clint!
I was trying to confirm whether or not AO-27 was going to be ON for the 2141UTC pass on Saturday September 10 here in Southern California. But the AO27.org site has been unavailable. The AO-27 Java app shows OFF at 2037 UTS and not back ON until 2210 UTC ...
Has the Java app been reliable in its predictions three days out?
Other than compensating for the small drift in the satellite's onboard clock, the Java app is pretty accurate. My app is showing the start time for the repeater on that Saturday afternoon pass at 21:47:16 UTC, which would match up with a west-coast pass between 2141-2155 UTC. Unless the onboard clock and schedule have been reset, expect the start time to be a minute or two before the predicted time.
Good luck and 73!
Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/