I have had success with the excellent predictions of the IridFlar program. I believe I have the latest version (dated 10/24). I was excited to see a flare coming up on Saturday night, but when I compared the prediction to the output of SatSpy 2.0 and Quicksat, there was a substantial discrepancy. Quicksat agrees with Satspy in predicting that Iridium 21 will be well out of range at flare time. Could someone point me in the right direction? ( I am VERY new at this! ) Have I made an error, or is there another explanation for the discrepancy? Data follows. Thanks, Gregory May TLE: IRIDIUM 21 1 24873U 97034E 97304.06540004 +.00000524 +00000-0 +69122-4 0 00748 2 24873 086.3957 134.7443 0010765 198.0141 162.0699 14.77913437016762 My location: Cleveland Ohio 41.291 N 81.644 W Alt: 1175' (358m) EST time Evening of Saturday, Nov 8th Flare predicted : 6:16 Az: 354 Elev: 56 Quicksat & Satspy show pass 12 minutes earlier