Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2017 10 15.  Predictions up to the next  14.0 days:

     Date     Time(LANDSAT-8) LANDSAT-8 Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/15/2017   22:25:43   ( -70.17,  20.16) 10/15/2017   22:24:32  ( -70.19,  20.19)    2.91                71
 10/15/2017   23:15:10   (  70.06,-172.34) 10/15/2017   23:15:16  (  70.07,-172.32)    1.46                 6
 10/16/2017   00:04:43   ( -69.79,  -5.09) 10/16/2017   00:05:55  ( -69.83,  -4.64)   18.05                72
 10/18/2017   14:42:13   ( -70.13, 136.00) 10/18/2017   14:41:26  ( -70.12, 136.06)    2.60                47
 10/18/2017   15:31:40   (  70.02, -56.52) 10/18/2017   15:32:10  (  70.00, -56.45)    3.40                30
 10/21/2017   06:09:01   (  70.85,  85.31) 10/21/2017   06:07:53  (  70.93,  83.21)   77.07                68
 10/21/2017   06:58:43   ( -70.09,-108.18) 10/21/2017   06:58:21  ( -70.11,-108.16)    1.98                22
 10/21/2017   07:48:10   (  69.98,  59.30) 10/21/2017   07:49:05  (  69.99,  59.33)    1.44                55
 10/23/2017   22:25:42   (  70.20,-159.78) 10/23/2017   22:24:34  (  70.19,-159.83)    2.68                68
 10/23/2017   23:15:13   ( -70.05,   7.63) 10/23/2017   23:15:15  ( -70.05,   7.70)    2.47                 2
 10/24/2017   00:04:44   (  69.71, 174.81) 10/24/2017   00:05:55  (  69.72, 175.50)   26.59                71
 10/26/2017   14:42:11   (  70.15, -43.97) 10/26/2017   14:41:27  (  70.13, -43.98)    2.05                44
 10/26/2017   15:31:41   ( -70.05, 123.52) 10/26/2017   15:32:09  ( -70.04, 123.47)    1.99                28
 10/29/2017   06:09:00   ( -70.97, -94.51) 10/29/2017   06:07:53  ( -71.03, -96.97)   89.12                67
 10/29/2017   06:58:41   (  70.09,  71.82) 10/29/2017   06:58:21  (  70.08,  71.87)    2.26                20
 10/29/2017   07:48:11   ( -69.99,-120.68) 10/29/2017   07:49:03  ( -69.98,-120.68)    0.75                52