Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 4 7.  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)
 04/07/2021   06:58:08   ( -70.17,-108.13) 04/07/2021   06:57:09  ( -70.15,-108.18)    2.58                59
 04/07/2021   07:47:36   (  70.01,  59.29) 04/07/2021   07:47:53  (  70.02,  59.33)    1.98                17
 04/07/2021   08:37:15   ( -69.40,-133.91) 04/07/2021   08:38:24  ( -69.37,-132.39)   59.69                69
 04/09/2021   23:14:37   ( -70.12,   7.68) 04/09/2021   23:14:02  ( -70.09,   7.69)    3.32                35
 04/10/2021   00:04:04   (  70.02, 175.17) 04/10/2021   00:04:47  (  70.02, 175.11)    2.53                43
 04/12/2021   14:41:31   (  70.45, -43.60) 04/12/2021   14:40:20  (  70.49, -44.47)   32.64                71
 04/12/2021   15:31:06   ( -70.07, 123.48) 04/12/2021   15:30:56  ( -70.09, 123.47)    1.98                10
 04/12/2021   16:20:33   (  69.96, -69.03) 04/12/2021   16:21:40  (  69.97, -69.04)    0.82                67
 04/15/2021   06:58:03   (  70.18,  71.87) 04/15/2021   06:57:07  (  70.18,  71.80)    2.83                56
 04/15/2021   07:47:34   ( -70.02,-120.72) 04/15/2021   07:47:48  ( -70.04,-120.67)    2.70                14
 04/15/2021   08:37:12   (  69.30,  45.95) 04/15/2021   08:38:20  (  69.28,  47.75)   70.86                68
 04/17/2021   23:14:32   (  70.11,-172.34) 04/17/2021   23:14:00  (  70.13,-172.35)    1.67                32
 04/18/2021   00:04:02   ( -70.01,  -4.85) 04/18/2021   00:04:42  ( -70.04,  -4.89)    3.22                40
 04/20/2021   14:41:28   ( -70.49, 136.45) 04/20/2021   14:40:16  ( -70.56, 135.44)   37.92                72
 04/20/2021   15:31:00   (  70.10, -56.48) 04/20/2021   15:30:53  (  70.08, -56.50)    2.37                 7
 04/20/2021   16:20:30   ( -70.00, 111.02) 04/20/2021   16:21:35  ( -69.99, 110.96)    2.91                65