Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2017 12 16.  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)
 12/16/2017   06:58:35   (  70.06,  71.77) 12/16/2017   06:58:08  (  70.09,  71.82)    3.05                27
 12/16/2017   07:48:04   ( -70.01,-120.68) 12/16/2017   07:48:50  ( -69.99,-120.72)    2.27                46
 12/18/2017   22:25:35   ( -70.32,  20.37) 12/18/2017   22:24:22  ( -70.40,  19.79)   23.30                73
 12/18/2017   23:15:04   (  70.06,-172.37) 12/18/2017   23:15:00  (  70.03,-172.33)    2.84                 4
 12/19/2017   00:04:34   ( -69.95,  -4.89) 12/19/2017   00:05:42  ( -69.93,  -4.86)    1.61                68
 12/21/2017   14:42:07   ( -70.15, 136.00) 12/21/2017   14:41:10  ( -70.14, 135.98)    1.56                57
 12/21/2017   15:31:34   (  70.04, -56.51) 12/21/2017   15:31:54  (  70.04, -56.56)    2.04                20
 12/21/2017   16:21:16   ( -69.28, 110.08) 12/21/2017   16:22:24  ( -69.30, 111.84)   69.37                68
 12/24/2017   06:58:38   ( -70.08,-108.23) 12/24/2017   06:58:03  ( -70.08,-108.17)    2.27                35
 12/24/2017   07:48:05   (  69.97,  59.26) 12/24/2017   07:48:47  (  69.99,  59.29)    2.02                42
 12/26/2017   22:25:32   (  70.49,-159.39) 12/26/2017   22:24:21  (  70.51,-160.38)   36.89                71
 12/26/2017   23:15:08   ( -70.06,   7.62) 12/26/2017   23:14:57  ( -70.09,   7.60)    3.22                11
 12/27/2017   00:04:35   (  69.95, 175.11) 12/27/2017   00:05:40  (  69.94, 175.14)    1.54                65
 12/29/2017   14:42:08   (  70.14, -44.03) 12/29/2017   14:41:08  (  70.15, -44.04)    1.55                60
 12/29/2017   15:31:37   ( -70.03, 123.46) 12/29/2017   15:31:49  ( -70.04, 123.45)    0.82                12
 12/29/2017   16:21:14   (  69.37, -69.81) 12/29/2017   16:22:22  (  69.36, -68.25)   61.20                68