Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2020 12 28.  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)
 12/29/2020   15:31:39   (  70.07, -56.45) 12/29/2020   15:31:09  (  70.05, -56.46)    2.40                30
 12/29/2020   16:21:09   ( -69.96, 111.02) 12/29/2020   16:21:51  ( -69.96, 110.99)    1.32                42
 01/01/2021   06:58:37   ( -70.35,-107.81) 01/01/2021   06:57:25  ( -70.39,-108.53)   27.14                72
 01/01/2021   07:48:08   (  70.02,  59.36) 01/01/2021   07:48:04  (  70.01,  59.36)    1.33                 4
 01/01/2021   08:37:38   ( -69.91,-133.16) 01/01/2021   08:38:46  ( -69.92,-133.18)    1.13                68
 01/03/2021   23:15:10   ( -70.08,   7.68) 01/03/2021   23:14:15  ( -70.08,   7.70)    0.86                55
 01/04/2021   00:04:37   (  69.97, 175.17) 01/04/2021   00:04:59  (  69.97, 175.18)    0.66                22
 01/04/2021   00:54:20   ( -69.15, -18.30) 01/04/2021   00:55:27  ( -69.14, -16.29)   79.82                67
 01/06/2021   15:31:38   ( -70.03, 123.49) 01/06/2021   15:31:09  ( -70.05, 123.53)    2.80                29
 01/06/2021   16:21:04   (  69.97, -68.95) 01/06/2021   16:21:53  (  69.94, -69.01)    3.45                49
 01/09/2021   06:58:35   (  70.17,  71.95) 01/09/2021   06:57:23  (  70.17,  71.79)    6.17                72
 01/09/2021   07:48:06   ( -70.02,-120.64) 01/09/2021   07:48:04  ( -70.01,-120.65)    0.97                 2
 01/09/2021   08:37:34   (  69.85,  46.77) 01/09/2021   08:38:47  (  69.86,  46.89)    4.76                73