Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 2 20.  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)
 02/22/2023   07:10:14   ( -70.11,-111.29) 02/22/2023   07:10:53  ( -70.13,-111.26)    2.93                39
 02/22/2023   08:00:58   (  70.00,  56.19) 02/22/2023   08:00:21  (  69.98,  56.17)    2.15                37
 02/24/2023   22:36:34   (  70.55,-163.53) 02/24/2023   22:37:44  (  70.46,-162.53)   38.56                70
 02/24/2023   23:27:09   ( -70.09,   4.51) 02/24/2023   23:27:19  ( -70.07,   4.53)    2.67                10
 02/25/2023   00:17:53   (  69.98, 171.99) 02/25/2023   00:16:46  (  69.96, 172.03)    2.42                67
 02/27/2023   14:53:21   (  70.12, -47.09) 02/27/2023   14:54:14  (  70.13, -47.11)    1.31                53
 02/27/2023   15:44:03   ( -70.02, 120.37) 02/27/2023   15:43:44  ( -70.01, 120.36)    1.04                19
 02/27/2023   16:34:32   (  69.12, -71.01) 02/27/2023   16:33:25  (  69.13, -73.19)   86.50                67
 03/02/2023   07:10:14   (  70.07,  68.75) 03/02/2023   07:10:37  (  70.10,  68.74)    3.12                23
 03/02/2023   08:00:56   ( -69.97,-123.78) 03/02/2023   08:00:07  ( -69.98,-123.79)    1.64                49
 03/04/2023   22:36:24   ( -70.13,  17.11) 03/04/2023   22:37:34  ( -70.14,  17.05)    2.51                70
 03/04/2023   23:27:08   (  70.03,-175.42) 03/04/2023   23:27:01  (  70.03,-175.46)    1.43                 7
 03/05/2023   00:17:46   ( -69.71,  -7.64) 03/05/2023   00:16:34  ( -69.75,  -8.21)   22.53                72