Hello all, In the following you see visibility predictions for the ISS generated with element sets 11 and 4 days old (from Ray Hoad) and new ones (from space-track). Differences of about one and a half minutes do occur. Even the orbit number changes ! Either you use the newest data or you should be patient ;) Vy 73, Viktor OE1VKW -------------------------------------------------------------------------------- Element Set Number: 105 (Orbit 70873) Element Set Epoch : 31Mar11 21:27:39.138 UTC Date (UTC) Time (UTC) of Duration Azimuth at Peak Vis Orbit AOS MEL LOS of Pass AOS MEL LOS Elev Mon 11Apr11 20:58:54 21:02:49 21:06:47 00:07:53 188 135 81 9.8 NNN 71046 22:32:41 22:37:34 22:42:27 00:09:46 235 150 69 56.6* NNN 71047 -------------------------------------------------------------------------------- Element Set Number: 150 (Orbit 70981) Element Set Epoch : 07Apr11 18:09:13.138 UTC Date (UTC) Time (UTC) of Duration Azimuth at Peak Vis Orbit AOS MEL LOS of Pass AOS MEL LOS Elev Mon 11Apr11 20:59:48 21:03:46 21:07:44 00:07:56 189 135 81 10.0 NNN 71046 22:33:37 22:38:30 22:43:22 00:09:46 235 150 69 57.4* NNN 71047 -------------------------------------------------------------------------------- Element Set Number: 169 (Orbit 71038) Element Set Epoch : 11Apr11 09:01:50.793 UTC Date (UTC) Time (UTC) of Duration Azimuth at Peak Vis Orbit AOS MEL LOS of Pass AOS MEL LOS Elev Mon 11Apr11 21:00:22 21:04:20 21:08:18 00:07:56 189 135 81 10.1 NNN 71047 22:34:10 22:39:03 22:43:59 00:09:49 236 155 69 58.0* NNN 71048 --------------------------------------------------------------------------------