Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 11 30.  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)
 12/01/2025   14:54:00   (  70.10, -47.16) 12/01/2025   14:54:32  (  70.10, -47.14)    0.79                32
 12/01/2025   15:44:42   ( -70.00, 120.32) 12/01/2025   15:44:02  ( -69.99, 120.34)    0.80                40
 12/04/2025   06:20:18   ( -70.36, -99.11) 12/04/2025   06:21:30  ( -70.28, -98.65)   19.83                72
 12/04/2025   07:10:58   (  70.05,  68.67) 12/04/2025   07:10:59  (  70.06,  68.69)    1.00                 1
 12/04/2025   08:01:40   ( -69.94,-123.84) 12/04/2025   08:00:29  ( -69.95,-123.83)    1.21                71
 12/06/2025   22:37:13   ( -70.10,  17.05) 12/06/2025   22:38:00  ( -70.10,  16.99)    2.05                47
 12/06/2025   23:27:57   (  70.01,-175.50) 12/06/2025   23:27:27  (  69.99,-175.52)    2.08                30
 12/09/2025   14:03:40   (  70.71, -35.48) 12/09/2025   14:04:49  (  70.61, -34.01)   55.50                69
 12/09/2025   14:54:12   ( -70.06, 132.87) 12/09/2025   14:54:27  ( -70.07, 132.83)    1.50                15
 12/09/2025   15:44:56   (  69.97, -59.69) 12/09/2025   15:43:54  (  69.95, -59.68)    2.39                62
 12/12/2025   06:20:29   (  70.16,  81.16) 12/12/2025   06:21:23  (  70.16,  81.23)    2.80                54
 12/12/2025   07:11:11   ( -70.03,-111.33) 12/12/2025   07:10:54  ( -70.00,-111.36)    2.83                17
 12/12/2025   08:01:41   (  69.20,  57.19) 12/12/2025   08:00:33  (  69.23,  55.22)   77.71                68