Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 2 6.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 02/06/2023   07:10:16   ( -70.11,-111.25) 02/06/2023   07:11:08  ( -70.12,-111.31)    2.57                52
 02/06/2023   08:01:00   (  69.99,  56.24) 02/06/2023   08:00:35  (  70.01,  56.19)    3.23                25
 02/06/2023   08:51:26   ( -69.06,-135.10) 02/06/2023   08:50:19  ( -69.13,-137.37)   90.60                67
 02/08/2023   23:27:09   ( -70.13,   4.49) 02/08/2023   23:27:36  ( -70.12,   4.57)    3.31                27
 02/09/2023   00:17:52   (  69.96, 172.05) 02/09/2023   00:17:04  (  69.96, 171.99)    2.60                48
 02/11/2023   14:53:22   (  70.36, -47.40) 02/11/2023   14:54:33  (  70.26, -46.98)   19.29                71
 02/11/2023   15:44:00   ( -70.06, 120.38) 02/11/2023   15:44:05  ( -70.04, 120.34)    2.41                 5
 02/11/2023   16:34:44   (  69.94, -72.14) 02/11/2023   16:33:32  (  69.93, -72.17)    1.80                72
 02/14/2023   07:10:09   (  70.13,  68.72) 02/14/2023   07:11:01  (  70.15,  68.75)    2.60                52
 02/14/2023   08:00:51   ( -70.04,-123.82) 02/14/2023   08:00:31  ( -70.05,-123.77)    2.12                20
 02/14/2023   08:51:19   (  69.08,  44.88) 02/14/2023   08:50:12  (  69.16,  42.68)   87.62                67
 02/16/2023   23:27:00   (  70.07,-175.41) 02/16/2023   23:27:29  (  70.08,-175.46)    2.08                29
 02/17/2023   00:17:42   ( -69.98,  -7.95) 02/17/2023   00:16:59  ( -69.97,  -7.98)    1.31                43
 02/19/2023   14:53:14   ( -70.49, 132.41) 02/19/2023   14:54:25  ( -70.37, 133.20)   32.41                71
 02/19/2023   15:43:51   (  70.02, -59.56) 02/19/2023   15:43:56  (  70.04, -59.64)    3.47                 5
 02/19/2023   16:34:33   ( -69.92, 107.91) 02/19/2023   16:33:26  ( -69.93, 107.85)    2.55                67