Simultaneous Nadir Overpasses (SNOs) between LANDSAT-8 and NPP
TLE Epoch: 2021 2 18.  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)
 02/18/2021   06:58:28   ( -70.11,-108.18) 02/18/2021   06:57:21  ( -70.11,-108.15)    1.03                67
 02/18/2021   07:47:55   (  70.01,  59.33) 02/18/2021   07:48:05  (  69.99,  59.33)    2.17                10
 02/18/2021   08:37:30   ( -69.62,-133.58) 02/18/2021   08:38:41  ( -69.59,-132.74)   32.60                71
 02/20/2021   23:14:57   ( -70.07,   7.64) 02/20/2021   23:14:15  ( -70.06,   7.70)    2.34                42
 02/21/2021   00:04:24   (  69.97, 175.14) 02/21/2021   00:04:59  (  69.95, 175.18)    2.60                35
 02/23/2021   14:41:47   (  70.63, -43.30) 02/23/2021   14:40:38  (  70.68, -44.83)   56.95                69
 02/23/2021   15:31:25   ( -70.07, 123.53) 02/23/2021   15:31:10  ( -70.06, 123.46)    2.80                15
 02/23/2021   16:20:53   (  69.91, -69.05) 02/23/2021   16:21:53  (  69.90, -68.98)    3.08                60
 02/26/2021   06:58:23   (  70.13,  71.86) 02/26/2021   06:57:21  (  70.11,  71.84)    2.02                62
 02/26/2021   07:47:53   ( -70.02,-120.66) 02/26/2021   07:48:03  ( -70.02,-120.70)    1.33                10
 02/26/2021   08:37:29   (  69.42,  46.15) 02/26/2021   08:38:38  (  69.43,  47.48)   51.85                69
 02/28/2021   23:14:52   (  70.07,-172.35) 02/28/2021   23:14:15  (  70.07,-172.32)    0.81                37
 03/01/2021   00:04:22   ( -69.97,  -4.86) 03/01/2021   00:04:57  ( -69.98,  -4.86)    1.06                35
 03/03/2021   14:41:45   ( -70.61, 136.68) 03/03/2021   14:40:35  ( -70.66, 135.21)   54.58                70
 03/03/2021   15:31:20   (  70.06, -56.48) 03/03/2021   15:31:09  (  70.03, -56.49)    3.54                11
 03/03/2021   16:20:50   ( -69.96, 111.01) 03/03/2021   16:21:51  ( -69.93, 110.97)    3.23                61