Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 7 19.  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)
 07/20/2021   06:08:40   ( -70.95, -94.48) 07/20/2021   06:07:33  ( -71.00, -97.02)   91.96                67
 07/20/2021   06:58:22   (  70.03,  71.80) 07/20/2021   06:58:01  (  70.04,  71.84)    1.86                21
 07/20/2021   07:47:51   ( -69.98,-120.65) 07/20/2021   07:48:43  ( -69.96,-120.72)    3.17                52
 07/22/2021   22:25:26   ( -70.12,  20.15) 07/22/2021   22:24:13  ( -70.11,  20.20)    2.16                73
 07/22/2021   23:14:53   (  70.01,-172.36) 07/22/2021   23:14:58  (  70.03,-172.39)    2.80                 5
 07/23/2021   00:04:24   ( -69.79,  -5.03) 07/23/2021   00:05:36  ( -69.79,  -4.70)   12.39                72
 07/25/2021   14:41:56   ( -70.10, 136.00) 07/25/2021   14:41:09  ( -70.10, 135.97)    0.89                47
 07/25/2021   15:31:23   (  69.99, -56.51) 07/25/2021   15:31:53  (  69.98, -56.53)    1.48                30
 07/28/2021   06:08:45   (  70.83,  85.33) 07/28/2021   06:07:37  (  70.86,  83.20)   77.80                68
 07/28/2021   06:58:28   ( -70.02,-108.24) 07/28/2021   06:58:05  ( -70.04,-108.17)    3.36                23
 07/28/2021   07:47:55   (  69.91,  59.25) 07/28/2021   07:48:49  (  69.92,  59.32)    3.09                54
 07/30/2021   22:25:28   (  70.14,-159.81) 07/30/2021   22:24:20  (  70.12,-159.85)    2.68                68
 07/30/2021   23:14:58   ( -70.05,   7.68) 07/30/2021   23:15:02  ( -70.03,   7.61)    3.26                 4
 07/31/2021   00:04:30   (  69.65, 174.78) 07/31/2021   00:05:41  (  69.65, 175.49)   27.33                71
 08/02/2021   14:42:00   (  70.05, -44.06) 08/02/2021   14:41:16  (  70.07, -44.00)    2.73                44
 08/02/2021   15:31:30   ( -69.96, 123.44) 08/02/2021   15:31:58  ( -69.97, 123.46)    1.59                28