Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2017 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)
 12/08/2017   06:08:50   (  70.95,  85.46) 12/08/2017   06:07:43  (  70.97,  83.08)   86.33                67
 12/08/2017   06:58:34   ( -70.07,-108.21) 12/08/2017   06:58:10  ( -70.09,-108.18)    1.93                24
 12/08/2017   07:48:01   (  69.97,  59.29) 12/08/2017   07:48:54  (  69.98,  59.29)    1.39                53
 12/10/2017   22:25:33   (  70.18,-159.81) 12/10/2017   22:24:22  (  70.18,-159.86)    1.91                71
 12/10/2017   23:15:03   ( -70.07,   7.67) 12/10/2017   23:15:04  ( -70.07,   7.61)    2.21                 1
 12/11/2017   00:04:33   (  69.80, 174.93) 12/11/2017   00:05:45  (  69.81, 175.31)   14.86                72
 12/13/2017   14:42:03   (  70.11, -44.03) 12/13/2017   14:41:15  (  70.12, -44.00)    1.23                48
 12/13/2017   15:31:33   ( -70.01, 123.46) 12/13/2017   15:31:57  ( -70.01, 123.48)    0.98                24
 12/16/2017   06:58:31   (  70.10,  71.83) 12/16/2017   06:58:08  (  70.11,  71.78)    2.81                23
 12/16/2017   07:48:01   ( -69.99,-120.68) 12/16/2017   07:48:50  ( -70.01,-120.74)    2.63                49
 12/18/2017   22:25:32   ( -70.24,  20.28) 12/18/2017   22:24:19  ( -70.26,  20.02)    9.81                73
 12/18/2017   23:15:00   (  70.07,-172.32) 12/18/2017   23:15:01  (  70.06,-172.36)    2.41                 1
 12/19/2017   00:04:31   ( -69.92,  -4.90) 12/19/2017   00:05:43  ( -69.95,  -4.88)    3.34                72