20180501
  day     Metop-A     23:08:19 - 23:19:30  
          Metop-B     00:06:16 - 00:19:55  
          NOAA-18     00:28:50 - 00:38:22  
          Metop-A     00:47:29 - 01:01:02  
          Metop-B     01:47:10 - 01:58:16  
          NPP       x 02:29:08 - 02:41:02        0s
          Metop-A     02:30:47 - 02:35:29  
          NPP       x 04:08:14 - 04:21:43        0s
          NOAA-19     04:12:42 - 04:19:43  
          NOAA-19     05:48:48 - 06:02:48  
          NOAA-19     07:31:30 - 07:42:12  
          NOAA-18     08:31:35 - 08:42:34  
          NOAA-18     10:10:03 - 10:24:15  
  night   Metop-B     09:49:43 - 09:56:42  
          Metop-A     10:27:47 - 10:39:38  
          Metop-B     11:25:24 - 11:39:08  
          Metop-A     12:06:47 - 12:20:11  
          Metop-B     13:07:42 - 13:17:48  
          NPP         14:50:52 - 14:59:48  
          NPP         16:29:08 - 16:43:03  
          NPP       x 18:11:10 - 18:19:41        0s
          NOAA-19     18:13:55 - 18:27:14  
          NOAA-19     19:54:44 - 20:07:26  
          NOAA-18     20:57:33 - 21:03:42  
          NOAA-18     22:34:59 - 22:49:10