Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 3 27.  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)
 03/27/2021   14:41:37   (  70.41, -43.64) 03/27/2021   14:40:26  (  70.46, -44.45)   30.69                71
 03/27/2021   15:31:11   ( -70.08, 123.51) 03/27/2021   15:31:02  ( -70.07, 123.48)    1.67                 9
 03/27/2021   16:20:39   (  69.92, -69.06) 03/27/2021   16:21:46  (  69.94, -69.02)    2.73                67
 03/30/2021   06:58:09   (  70.16,  71.87) 03/30/2021   06:57:13  (  70.13,  71.84)    3.31                56
 03/30/2021   07:47:39   ( -70.05,-120.65) 03/30/2021   07:47:55  ( -70.05,-120.72)    2.70                16
 03/30/2021   08:37:19   (  69.22,  45.87) 03/30/2021   08:38:26  (  69.23,  47.78)   75.36                67
 04/01/2021   23:14:38   (  70.12,-172.31) 04/01/2021   23:14:07  (  70.12,-172.37)    2.26                31
 04/02/2021   00:04:08   ( -70.01,  -4.83) 04/02/2021   00:04:48  ( -69.99,  -4.85)    3.12                40
 04/04/2021   14:41:34   ( -70.52, 136.50) 04/04/2021   14:40:23  ( -70.55, 135.43)   39.74                71
 04/04/2021   15:31:07   (  70.07, -56.50) 04/04/2021   15:31:00  (  70.06, -56.50)    1.77                 7
 04/04/2021   16:20:37   ( -69.97, 110.99) 04/04/2021   16:21:42  ( -69.97, 110.95)    1.79                65
 04/07/2021   06:58:09   ( -70.14,-108.17) 04/07/2021   06:57:10  ( -70.17,-108.20)    3.32                59
 04/07/2021   07:47:36   (  70.02,  59.31) 04/07/2021   07:47:54  (  70.05,  59.29)    3.29                18
 04/07/2021   08:37:16   ( -69.37,-133.94) 04/07/2021   08:38:25  ( -69.38,-132.41)   60.13                69
 04/09/2021   23:14:37   ( -70.09,   7.63) 04/09/2021   23:14:02  ( -70.11,   7.67)    2.72                35
 04/10/2021   00:04:03   (  70.02, 175.19) 04/10/2021   00:04:46  (  69.99, 175.15)    3.34                43