Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 9 25.  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)
 09/25/2025   22:37:10   (  70.13,-163.02) 09/25/2025   22:38:01  (  70.13,-162.96)    2.62                51
 09/25/2025   23:27:51   ( -70.00,   4.48) 09/25/2025   23:27:31  ( -70.02,   4.51)    1.84                20
 09/26/2025   00:18:20   (  69.07, 173.14) 09/26/2025   00:17:13  (  69.09, 170.90)   88.99                67
 09/28/2025   14:54:02   (  70.08, -47.17) 09/28/2025   14:54:30  (  70.10, -47.12)    2.87                28
 09/28/2025   15:44:43   ( -69.96, 120.33) 09/28/2025   15:44:00  ( -69.99, 120.35)    3.14                43
 10/01/2025   06:20:15   ( -70.49, -99.34) 10/01/2025   06:21:26  ( -70.40, -98.44)   35.11                71
 10/01/2025   07:10:53   (  70.04,  68.67) 10/01/2025   07:10:58  (  70.02,  68.66)    2.23                 5
 10/01/2025   08:01:34   ( -69.92,-123.83) 10/01/2025   08:00:28  ( -69.91,-123.86)    1.59                66
 10/03/2025   22:37:00   ( -70.10,  17.05) 10/03/2025   22:37:58  ( -70.13,  17.06)    2.90                58
 10/03/2025   23:27:45   (  70.02,-175.52) 10/03/2025   23:27:25  (  70.02,-175.46)    2.37                20
 10/04/2025   00:18:15   ( -69.32,  -7.17) 10/04/2025   00:17:05  ( -69.36,  -8.72)   61.22                70
 10/06/2025   14:53:52   ( -70.09, 132.85) 10/06/2025   14:54:25  ( -70.09, 132.89)    1.66                33
 10/06/2025   15:44:36   (  69.96, -59.64) 10/06/2025   15:43:52  (  69.98, -59.62)    1.75                44
 10/09/2025   06:20:07   (  70.43,  80.79) 10/09/2025   06:21:18  (  70.33,  81.50)   28.64                71
 10/09/2025   07:10:43   ( -70.04,-111.29) 10/09/2025   07:10:51  ( -70.06,-111.25)    2.51                 8
 10/09/2025   08:01:27   (  69.91,  56.22) 10/09/2025   08:00:19  (  69.89,  56.15)    3.37                68