Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 4 10.  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)
 04/12/2021   14:41:31   (  70.44, -43.63) 04/12/2021   14:40:20  (  70.51, -44.50)   33.48                71
 04/12/2021   15:31:06   ( -70.05, 123.45) 04/12/2021   15:30:55  ( -70.06, 123.52)    2.72                11
 04/12/2021   16:20:33   (  69.94, -69.05) 04/12/2021   16:21:39  (  69.93, -68.99)    2.80                66
 04/15/2021   06:58:04   (  70.16,  71.85) 04/15/2021   06:57:07  (  70.14,  71.85)    1.74                57
 04/15/2021   07:47:34   ( -70.05,-120.67) 04/15/2021   07:47:49  ( -70.06,-120.70)    1.49                15
 04/15/2021   08:37:13   (  69.28,  45.92) 04/15/2021   08:38:21  (  69.30,  47.72)   70.87                68
 04/17/2021   23:14:33   (  70.09,-172.37) 04/17/2021   23:14:00  (  70.09,-172.30)    2.68                33
 04/18/2021   00:04:03   ( -69.99,  -4.88) 04/18/2021   00:04:42  ( -70.01,  -4.85)    2.07                39
 04/20/2021   14:41:27   ( -70.53, 136.49) 04/20/2021   14:40:16  ( -70.58, 135.41)   40.48                71
 04/20/2021   15:31:00   (  70.08, -56.51) 04/20/2021   15:30:53  (  70.10, -56.53)    2.02                 7
 04/20/2021   16:20:30   ( -69.98, 110.99) 04/20/2021   16:21:34  ( -69.95, 111.01)    3.10                64
 04/23/2021   06:58:01   ( -70.18,-108.13) 04/23/2021   06:57:02  ( -70.16,-108.16)    2.68                59
 04/23/2021   07:47:28   (  70.06,  59.35) 04/23/2021   07:47:46  (  70.05,  59.32)    1.71                18