Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2018 12 6.  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)
 12/08/2018   14:41:49   ( -70.12, 136.00) 12/08/2018   14:41:17  ( -70.12, 136.01)    0.72                32
 12/08/2018   15:31:16   (  70.02, -56.50) 12/08/2018   15:32:01  (  70.00, -56.51)    1.49                45
 12/11/2018   06:08:46   (  70.31,  84.52) 12/11/2018   06:07:33  (  70.37,  84.07)   18.28                73
 12/11/2018   06:58:18   ( -70.09,-108.16) 12/11/2018   06:58:11  ( -70.06,-108.14)    3.06                 7
 12/11/2018   07:47:45   (  69.98,  59.33) 12/11/2018   07:48:55  (  69.95,  59.33)    2.98                70
 12/13/2018   22:25:16   (  70.16,-159.82) 12/13/2018   22:24:23  (  70.16,-159.84)    1.38                53
 12/13/2018   23:14:46   ( -70.05,   7.67) 12/13/2018   23:15:05  ( -70.06,   7.63)    2.09                19
 12/14/2018   00:04:27   (  69.17, 174.11) 12/14/2018   00:05:34  (  69.16, 176.25)   84.68                67
 12/16/2018   14:41:45   (  70.11, -44.00) 12/16/2018   14:41:17  (  70.12, -44.01)    0.77                28
 12/16/2018   15:31:15   ( -70.01, 123.49) 12/16/2018   15:31:59  ( -70.01, 123.47)    0.97                44
 12/19/2018   06:08:44   ( -70.34, -95.42) 12/19/2018   06:07:31  ( -70.38, -95.95)   20.29                73
 12/19/2018   06:58:14   (  70.06,  71.82) 12/19/2018   06:58:11  (  70.07,  71.83)    1.24                 3
 12/19/2018   07:47:44   ( -69.96,-120.69) 12/19/2018   07:48:53  ( -69.97,-120.69)    0.31                69