orbit epoch 00:01 00:01 01:59 01:59 03:56 03:56 05:53 05:53 07:50 07:50 09:47 09:47 11:45 11:45 13:42 13:42 15:39 15:39 17:36 17:36 19:33 19:33 21:31 21:31 23:28 23:28