Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 7 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)
 07/31/2025   21:46:55   (  70.78,-151.45) 07/31/2025   21:48:03  (  70.69,-149.73)   64.11                68
 07/31/2025   22:37:26   ( -70.09,  16.96) 07/31/2025   22:37:42  ( -70.09,  17.02)    2.18                16
 07/31/2025   23:28:09   (  69.95,-175.50) 07/31/2025   23:27:10  (  69.93,-175.56)    2.93                59
 08/03/2025   14:03:37   (  70.13, -34.64) 08/03/2025   14:04:41  (  70.11, -34.69)    2.89                64
 08/03/2025   14:54:19   ( -70.01, 132.85) 08/03/2025   14:54:11  ( -70.00, 132.78)    2.84                 8
 08/03/2025   15:44:55   (  69.50, -59.08) 08/03/2025   15:43:44  (  69.56, -60.18)   43.36                71
 08/06/2025   06:20:32   (  70.11,  81.15) 08/06/2025   06:21:09  (  70.12,  81.20)    1.80                37
 08/06/2025   07:11:14   ( -69.99,-111.34) 08/06/2025   07:10:39  ( -70.01,-111.32)    2.30                35
 08/08/2025   21:46:53   ( -70.70,  28.68) 08/08/2025   21:48:03  ( -70.60,  30.15)   55.47                70
 08/08/2025   22:37:26   (  70.05,-162.98) 08/08/2025   22:37:38  (  70.05,-163.01)    1.20                12
 08/08/2025   23:28:08   ( -69.92,   4.53) 08/08/2025   23:27:08  ( -69.94,   4.48)    3.08                60
 08/11/2025   14:03:37   ( -70.12, 145.38) 08/11/2025   14:04:39  ( -70.13, 145.36)    1.81                62
 08/11/2025   14:54:20   (  69.99, -47.12) 08/11/2025   14:54:06  (  70.01, -47.16)    3.24                14
 08/11/2025   15:44:54   ( -69.44, 121.02) 08/11/2025   15:43:44  ( -69.47, 119.72)   50.57                70