Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2018 12 23.  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)
 12/24/2018   14:41:48   ( -70.15, 136.03) 12/24/2018   14:41:15  ( -70.14, 135.96)    3.00                33
 12/24/2018   15:31:16   (  69.99, -56.55) 12/24/2018   15:31:58  (  69.98, -56.49)    2.58                42
 12/27/2018   06:08:44   (  70.45,  84.71) 12/27/2018   06:07:33  (  70.52,  83.82)   34.11                71
 12/27/2018   06:58:19   ( -70.07,-108.21) 12/27/2018   06:58:09  ( -70.10,-108.21)    3.46                10
 12/27/2018   07:47:46   (  69.96,  59.29) 12/27/2018   07:48:52  (  69.94,  59.33)    2.67                66
 12/29/2018   22:25:18   (  70.15,-159.84) 12/29/2018   22:24:20  (  70.17,-159.86)    1.86                58
 12/29/2018   23:14:48   ( -70.05,   7.64) 12/29/2018   23:15:02  ( -70.06,   7.61)    1.94                14
 12/30/2018   00:04:26   (  69.33, 174.30) 12/30/2018   00:05:34  (  69.33, 176.01)   66.93                68
 01/01/2019   14:41:48   (  70.13, -43.99) 01/01/2019   14:41:14  (  70.14, -44.04)    1.82                34
 01/01/2019   15:31:18   ( -70.03, 123.49) 01/01/2019   15:31:56  ( -70.03, 123.44)    2.17                38
 01/04/2019   06:08:44   ( -70.61, -95.06) 01/04/2019   06:07:33  ( -70.67, -96.43)   50.84                71
 01/04/2019   06:58:19   (  70.06,  71.78) 01/04/2019   06:58:07  (  70.05,  71.86)    3.06                12
 01/04/2019   07:47:49   ( -69.96,-120.73) 01/04/2019   07:48:49  ( -69.94,-120.66)    3.44                60