Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 9 22.  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)
 09/23/2025   06:20:20   (  70.28,  80.96) 09/23/2025   06:21:30  (  70.25,  81.33)   14.12                70
 09/23/2025   07:10:59   ( -70.05,-111.36) 09/23/2025   07:11:02  ( -70.02,-111.36)    2.43                 3
 09/23/2025   08:01:42   (  69.86,  56.22) 09/23/2025   08:00:30  (  69.87,  56.07)    5.95                72
 09/25/2025   22:37:10   (  70.11,-163.00) 09/25/2025   22:38:02  (  70.09,-163.02)    2.55                52
 09/25/2025   23:27:51   ( -69.98,   4.51) 09/25/2025   23:27:32  ( -69.97,   4.45)    2.43                19
 09/26/2025   00:18:20   (  69.05, 173.16) 09/26/2025   00:17:13  (  69.10, 170.91)   89.50                67
 09/28/2025   14:54:01   (  70.05, -47.13) 09/28/2025   14:54:30  (  70.05, -47.18)    1.90                29
 09/28/2025   15:44:42   ( -69.93, 120.37) 09/28/2025   15:44:00  ( -69.95, 120.30)    3.43                42
 10/01/2025   06:20:16   ( -70.51, -99.36) 10/01/2025   06:21:27  ( -70.37, -98.49)   36.05                71
 10/01/2025   07:10:54   (  70.06,  68.64) 10/01/2025   07:10:58  (  70.04,  68.69)    2.77                 4
 10/01/2025   08:01:35   ( -69.94,-123.85) 10/01/2025   08:00:28  ( -69.93,-123.83)    0.89                67
 10/03/2025   22:37:01   ( -70.10,  17.05) 10/03/2025   22:37:59  ( -70.10,  17.02)    1.34                58
 10/03/2025   23:27:45   (  69.97,-175.44) 10/03/2025   23:27:26  (  69.99,-175.49)    3.25                19
 10/04/2025   00:18:15   ( -69.26,  -7.09) 10/04/2025   00:17:06  ( -69.34,  -8.76)   66.00                69
 10/06/2025   14:53:53   ( -70.07, 132.88) 10/06/2025   14:54:26  ( -70.08, 132.87)    0.91                33
 10/06/2025   15:44:37   (  69.94, -59.61) 10/06/2025   15:43:53  (  69.96, -59.64)    2.78                44