Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 12 2.  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)
 12/04/2025   06:20:19   ( -70.37, -99.13) 12/04/2025   06:21:31  ( -70.27, -98.66)   21.01                72
 12/04/2025   07:10:59   (  70.06,  68.66) 12/04/2025   07:11:00  (  70.05,  68.68)    1.17                 1
 12/04/2025   08:01:41   ( -69.95,-123.85) 12/04/2025   08:00:30  ( -69.94,-123.85)    1.17                71
 12/06/2025   22:37:13   ( -70.11,  17.03) 12/06/2025   22:38:00  ( -70.09,  16.97)    3.38                47
 12/06/2025   23:27:57   (  70.02,-175.52) 12/06/2025   23:27:26  (  70.04,-175.46)    2.99                31
 12/09/2025   14:03:40   (  70.72, -35.50) 12/09/2025   14:04:49  (  70.60, -34.03)   55.81                69
 12/09/2025   14:54:12   ( -70.07, 132.85) 12/09/2025   14:54:27  ( -70.05, 132.81)    2.81                15
 12/09/2025   15:44:55   (  69.93, -59.63) 12/09/2025   15:43:54  (  69.94, -59.70)    3.10                61
 12/12/2025   06:20:29   (  70.17,  81.14) 12/12/2025   06:21:23  (  70.15,  81.20)    3.14                54
 12/12/2025   07:11:11   ( -70.04,-111.34) 12/12/2025   07:10:53  ( -70.04,-111.32)    1.03                18
 12/12/2025   08:01:40   (  69.16,  57.25) 12/12/2025   08:00:33  (  69.21,  55.20)   81.39                67
 12/14/2025   22:37:27   (  70.09,-162.98) 12/14/2025   22:37:49  (  70.11,-162.96)    2.04                22
 12/14/2025   23:28:10   ( -70.01,   4.46) 12/14/2025   23:27:19  ( -70.00,   4.53)    2.78                51