orbit epoch 00:00 00:00 01:57 01:57 03:55 03:55 05:52 05:52 07:49 07:49 09:46 09:46 11:43 11:43 13:41 13:41 15:38 15:38 17:35 17:35 19:32 19:32 21:29 21:29 23:27 23:27