Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 3 24.  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)
 03/24/2021   23:14:42   ( -70.10,   7.67) 03/24/2021   23:14:08  ( -70.09,   7.67)    0.81                34
 03/25/2021   00:04:09   (  69.99, 175.17) 03/25/2021   00:04:53  (  70.01, 175.09)    3.47                44
 03/27/2021   14:41:37   (  70.40, -43.65) 03/27/2021   14:40:26  (  70.47, -44.46)   31.08                71
 03/27/2021   15:31:11   ( -70.07, 123.51) 03/27/2021   15:31:02  ( -70.07, 123.47)    1.39                 9
 03/27/2021   16:20:38   (  69.97, -69.00) 03/27/2021   16:21:46  (  69.95, -69.03)    2.61                68
 03/30/2021   06:58:10   (  70.15,  71.86) 03/30/2021   06:57:14  (  70.14,  71.83)    1.88                56
 03/30/2021   07:47:40   ( -70.05,-120.65) 03/30/2021   07:47:56  ( -70.06,-120.73)    3.22                16
 03/30/2021   08:37:19   (  69.22,  45.86) 03/30/2021   08:38:26  (  69.24,  47.77)   75.21                67
 04/01/2021   23:14:38   (  70.11,-172.31) 04/01/2021   23:14:07  (  70.13,-172.39)    3.36                31
 04/02/2021   00:04:08   ( -70.01,  -4.83) 04/02/2021   00:04:48  ( -70.00,  -4.86)    2.28                40
 04/04/2021   14:41:34   ( -70.52, 136.50) 04/04/2021   14:40:23  ( -70.56, 135.41)   40.66                71
 04/04/2021   15:31:07   (  70.07, -56.50) 04/04/2021   15:31:00  (  70.07, -56.52)    0.99                 7
 04/04/2021   16:20:37   ( -69.97, 111.00) 04/04/2021   16:21:42  ( -69.99, 110.93)    3.02                65