Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 4 24.  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)
 04/25/2021   23:14:29   ( -70.14,   7.69) 04/25/2021   23:13:55  ( -70.14,   7.66)    1.60                34
 04/26/2021   00:03:56   (  70.04, 175.19) 04/26/2021   00:04:39  (  70.01, 175.15)    3.20                43
 04/28/2021   14:41:23   (  70.45, -43.62) 04/28/2021   14:40:12  (  70.50, -44.45)   31.09                71
 04/28/2021   15:30:57   ( -70.12, 123.53) 04/28/2021   15:30:48  ( -70.09, 123.50)    2.87                 9
 04/28/2021   16:20:25   (  69.95, -69.05) 04/28/2021   16:21:32  (  69.98, -69.01)    2.96                67
 05/01/2021   06:57:55   (  70.14,  71.81) 05/01/2021   06:56:58  (  70.15,  71.88)    3.11                57
 05/01/2021   07:47:25   ( -70.03,-120.71) 05/01/2021   07:47:40  ( -70.05,-120.66)    3.39                15
 05/01/2021   08:37:04   (  69.25,  45.88) 05/01/2021   08:38:11  (  69.25,  47.83)   76.68                67
 05/03/2021   23:14:22   (  70.15,-172.29) 05/03/2021   23:13:52  (  70.17,-172.37)    3.32                30
 05/04/2021   00:03:52   ( -70.05,  -4.81) 05/04/2021   00:04:33  ( -70.02,  -4.82)    3.27                41
 05/06/2021   14:41:18   ( -70.49, 136.44) 05/06/2021   14:40:07  ( -70.55, 135.49)   35.71                71
 05/06/2021   15:30:50   (  70.10, -56.48) 05/06/2021   15:30:44  (  70.08, -56.46)    2.44                 6
 05/06/2021   16:20:20   ( -70.00, 111.01) 05/06/2021   16:21:26  ( -69.98, 111.01)    2.19                66