Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2017 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)
 12/24/2017   06:58:36   ( -70.11,-108.19) 12/24/2017   06:58:03  ( -70.10,-108.19)    0.89                33
 12/24/2017   07:48:03   (  70.01,  59.31) 12/24/2017   07:48:47  (  69.99,  59.28)    2.04                44
 12/26/2017   22:25:31   (  70.41,-159.50) 12/26/2017   22:24:20  (  70.47,-160.31)   30.63                71
 12/26/2017   23:15:05   ( -70.08,   7.65) 12/26/2017   23:14:56  ( -70.05,   7.66)    2.81                 9
 12/27/2017   00:04:32   (  69.97, 175.15) 12/27/2017   00:05:40  (  69.95, 175.12)    3.03                68
 12/29/2017   14:42:04   (  70.15, -44.00) 12/29/2017   14:41:08  (  70.16, -44.05)    2.41                56
 12/29/2017   15:31:34   ( -70.04, 123.48) 12/29/2017   15:31:50  ( -70.06, 123.42)    3.10                16
 12/29/2017   16:21:13   (  69.27, -69.93) 12/29/2017   16:22:21  (  69.26, -68.11)   71.44                68
 01/01/2018   06:58:32   (  70.11,  71.82) 01/01/2018   06:58:00  (  70.12,  71.78)    2.09                32
 01/01/2018   07:48:02   ( -70.00,-120.70) 01/01/2018   07:48:42  ( -70.02,-120.74)    2.59                40
 01/03/2018   22:25:28   ( -70.50,  20.62) 01/03/2018   22:24:17  ( -70.60,  19.49)   43.50                71
 01/03/2018   23:15:01   (  70.06,-172.37) 01/03/2018   23:14:53  (  70.08,-172.39)    2.79                 8
 01/04/2018   00:04:31   ( -69.95,  -4.88) 01/04/2018   00:05:35  ( -69.98,  -4.91)    2.86                64