Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 4 21.  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)
 04/23/2021   06:58:01   ( -70.18,-108.13) 04/23/2021   06:57:02  ( -70.16,-108.16)    2.79                59
 04/23/2021   07:47:29   (  70.02,  59.29) 04/23/2021   07:47:46  (  70.04,  59.34)    2.61                17
 04/23/2021   08:37:09   ( -69.36,-133.98) 04/23/2021   08:38:17  ( -69.38,-132.37)   63.24                68
 04/25/2021   23:14:30   ( -70.11,   7.64) 04/25/2021   23:13:55  ( -70.12,   7.69)    2.12                35
 04/26/2021   00:03:56   (  70.00, 175.13) 04/26/2021   00:04:38  (  70.00, 175.17)    1.68                42
 04/28/2021   14:41:23   (  70.40, -43.68) 04/28/2021   14:40:11  (  70.49, -44.43)   29.07                72
 04/28/2021   15:30:57   ( -70.08, 123.48) 04/28/2021   15:30:47  ( -70.08, 123.53)    1.78                10
 04/28/2021   16:20:24   (  69.97, -69.03) 04/28/2021   16:21:31  (  69.97, -68.99)    1.54                67
 05/01/2021   06:57:55   (  70.15,  71.82) 05/01/2021   06:56:58  (  70.14,  71.90)    3.13                57
 05/01/2021   07:47:25   ( -70.05,-120.69) 05/01/2021   07:47:40  ( -70.04,-120.64)    2.01                15
 05/01/2021   08:37:04   (  69.27,  45.90) 05/01/2021   08:38:11  (  69.24,  47.84)   76.62                67
 05/03/2021   23:14:23   (  70.11,-172.35) 05/03/2021   23:13:51  (  70.11,-172.27)    3.01                32
 05/04/2021   00:03:53   ( -70.01,  -4.86) 05/04/2021   00:04:33  ( -70.01,  -4.81)    2.17                40