Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 3 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)
 03/22/2021   06:58:13   ( -70.12,-108.18) 03/22/2021   06:57:14  ( -70.11,-108.13)    2.29                59
 03/22/2021   07:47:40   (  70.01,  59.32) 03/22/2021   07:47:59  (  70.03,  59.29)    2.16                19
 03/22/2021   08:37:21   ( -69.30,-134.02) 03/22/2021   08:38:29  ( -69.32,-132.34)   66.11                68
 03/24/2021   23:14:42   ( -70.10,   7.67) 03/24/2021   23:14:08  ( -70.08,   7.68)    1.68                34
 03/25/2021   00:04:09   (  69.99, 175.16) 03/25/2021   00:04:53  (  70.01, 175.10)    3.39                44
 03/27/2021   14:41:37   (  70.40, -43.65) 03/27/2021   14:40:26  (  70.46, -44.46)   30.77                71
 03/27/2021   15:31:11   ( -70.08, 123.51) 03/27/2021   15:31:02  ( -70.07, 123.48)    1.75                 9
 03/27/2021   16:20:38   (  69.97, -69.00) 03/27/2021   16:21:46  (  69.94, -69.02)    2.80                68
 03/30/2021   06:58:10   (  70.15,  71.86) 03/30/2021   06:57:14  (  70.13,  71.84)    2.31                56
 03/30/2021   07:47:39   ( -70.05,-120.65) 03/30/2021   07:47:55  ( -70.05,-120.71)    2.47                16
 03/30/2021   08:37:19   (  69.22,  45.87) 03/30/2021   08:38:26  (  69.24,  47.78)   75.59                67
 04/01/2021   23:14:38   (  70.11,-172.31) 04/01/2021   23:14:07  (  70.12,-172.37)    2.15                31
 04/02/2021   00:04:09   ( -69.96,  -4.90) 04/02/2021   00:04:48  ( -69.98,  -4.83)    3.05                39