Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 12 5.  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)
 12/06/2025   22:37:14   ( -70.14,  16.99) 12/06/2025   22:38:04  ( -70.14,  17.03)    1.50                50
 12/06/2025   23:27:58   (  70.04,-175.56) 12/06/2025   23:27:31  (  70.04,-175.48)    3.10                27
 12/07/2025   00:18:23   ( -69.03,  -6.77) 12/07/2025   00:17:16  ( -69.10,  -9.11)   93.40                67
 12/09/2025   14:03:45   (  71.02, -35.99) 12/09/2025   14:04:51  (  70.90, -33.61)   87.50                66
 12/09/2025   14:54:11   ( -70.06, 132.87) 12/09/2025   14:54:34  ( -70.08, 132.81)    3.17                23
 12/09/2025   15:44:55   (  69.97, -59.68) 12/09/2025   15:44:01  (  69.97, -59.69)    0.79                54
 12/12/2025   06:20:28   (  70.16,  81.15) 12/12/2025   06:21:34  (  70.14,  81.14)    3.11                66
 12/12/2025   07:11:10   ( -70.04,-111.34) 12/12/2025   07:11:04  ( -70.03,-111.38)    1.73                 6
 12/12/2025   08:01:47   (  69.58,  56.65) 12/12/2025   08:00:36  (  69.64,  55.73)   36.35                71
 12/14/2025   22:37:26   (  70.11,-163.00) 12/14/2025   22:38:03  (  70.10,-163.03)    1.17                37
 12/14/2025   23:28:08   ( -69.98,   4.51) 12/14/2025   23:27:33  ( -70.00,   4.46)    3.08                35
 12/17/2025   14:03:48   ( -70.56, 144.74) 12/17/2025   14:04:59  ( -70.47, 145.75)   38.57                71
 12/17/2025   14:54:24   (  70.06, -47.17) 12/17/2025   14:54:31  (  70.08, -47.17)    2.49                 7
 12/17/2025   15:45:07   ( -69.98, 120.27) 12/17/2025   15:44:01  ( -69.98, 120.32)    1.95                66