Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 3 23.  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)
 03/24/2021   23:14:42   ( -70.09,   7.66) 03/24/2021   23:14:08  ( -70.09,   7.67)    0.39                34
 03/25/2021   00:04:09   (  69.99, 175.16) 03/25/2021   00:04:52  (  69.96, 175.17)    2.97                43
 03/27/2021   14:41:37   (  70.40, -43.65) 03/27/2021   14:40:25  (  70.42, -44.38)   27.30                72
 03/27/2021   15:31:11   ( -70.07, 123.51) 03/27/2021   15:31:02  ( -70.07, 123.47)    1.46                 9
 03/27/2021   16:20:38   (  69.96, -69.00) 03/27/2021   16:21:46  (  69.95, -69.03)    2.05                68
 03/30/2021   06:58:10   (  70.15,  71.86) 03/30/2021   06:57:14  (  70.14,  71.82)    1.66                56
 03/30/2021   07:47:40   ( -70.05,-120.65) 03/30/2021   07:47:56  ( -70.06,-120.73)    3.47                16
 03/30/2021   08:37:20   (  69.21,  45.86) 03/30/2021   08:38:27  (  69.25,  47.76)   75.10                67
 04/01/2021   23:14:38   (  70.11,-172.31) 04/01/2021   23:14:06  (  70.08,-172.31)    3.51                32
 04/02/2021   00:04:08   ( -70.01,  -4.82) 04/02/2021   00:04:48  ( -70.00,  -4.86)    2.31                40
 04/04/2021   14:41:34   ( -70.52, 136.51) 04/04/2021   14:40:23  ( -70.56, 135.41)   41.00                71
 04/04/2021   15:31:07   (  70.07, -56.49) 04/04/2021   15:31:00  (  70.08, -56.53)    1.39                 7
 04/04/2021   16:20:37   ( -69.98, 111.00) 04/04/2021   16:21:42  ( -69.99, 110.92)    3.28                65