Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 3 30.  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)
 03/30/2021   06:58:10   (  70.12,  71.82) 03/30/2021   06:57:13  (  70.11,  71.87)    2.11                57
 03/30/2021   07:47:40   ( -70.01,-120.71) 03/30/2021   07:47:55  ( -70.04,-120.70)    3.31                15
 03/30/2021   08:37:19   (  69.24,  45.90) 03/30/2021   08:38:26  (  69.22,  47.81)   75.41                67
 04/01/2021   23:14:39   (  70.08,-172.36) 04/01/2021   23:14:07  (  70.10,-172.34)    2.13                32
 04/02/2021   00:04:09   ( -69.97,  -4.88) 04/02/2021   00:04:48  ( -69.97,  -4.83)    2.10                39
 04/04/2021   14:41:35   ( -70.48, 136.44) 04/04/2021   14:40:23  ( -70.53, 135.45)   37.33                72
 04/04/2021   15:31:08   (  70.04, -56.54) 04/04/2021   15:31:00  (  70.04, -56.48)    2.65                 8
 04/04/2021   16:20:38   ( -69.93, 110.94) 04/04/2021   16:21:42  ( -69.96, 110.97)    3.19                64
 04/07/2021   06:58:08   ( -70.16,-108.14) 04/07/2021   06:57:09  ( -70.16,-108.18)    1.54                59
 04/07/2021   07:47:35   (  70.05,  59.34) 04/07/2021   07:47:53  (  70.04,  59.31)    1.53                18
 04/07/2021   08:37:15   ( -69.39,-133.92) 04/07/2021   08:38:24  ( -69.37,-132.39)   59.80                69
 04/09/2021   23:14:37   ( -70.11,   7.66) 04/09/2021   23:14:02  ( -70.10,   7.68)    1.16                35
 04/10/2021   00:04:04   (  69.99, 175.14) 04/10/2021   00:04:46  (  69.98, 175.17)    1.27                42
 04/12/2021   14:41:31   (  70.42, -43.64) 04/12/2021   14:40:19  (  70.45, -44.41)   28.91                72
 04/12/2021   15:31:05   ( -70.11, 123.53) 04/12/2021   15:30:56  ( -70.10, 123.46)    2.90                 9
 04/12/2021   16:20:32   (  69.99, -68.99) 04/12/2021   16:21:40  (  69.99, -69.06)    2.67                68