Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 7 29.  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)
 07/29/2025   06:20:31   ( -70.12, -98.85) 07/29/2025   06:21:13  ( -70.10, -98.85)    2.41                42
 07/29/2025   07:11:15   (  70.02,  68.61) 07/29/2025   07:10:40  (  70.00,  68.65)    3.22                35
 07/31/2025   21:46:55   (  70.78,-151.45) 07/31/2025   21:48:03  (  70.69,-149.73)   63.99                68
 07/31/2025   22:37:26   ( -70.09,  16.97) 07/31/2025   22:37:42  ( -70.09,  17.02)    1.99                16
 07/31/2025   23:28:09   (  69.94,-175.50) 07/31/2025   23:27:10  (  69.93,-175.56)    2.92                59
 08/03/2025   14:03:37   (  70.13, -34.64) 08/03/2025   14:04:41  (  70.11, -34.70)    3.13                64
 08/03/2025   14:54:19   ( -70.01, 132.86) 08/03/2025   14:54:11  ( -70.00, 132.78)    3.05                 8
 08/03/2025   15:44:55   (  69.50, -59.07) 08/03/2025   15:43:44  (  69.56, -60.18)   43.63                71
 08/06/2025   06:20:32   (  70.11,  81.16) 08/06/2025   06:21:09  (  70.11,  81.19)    1.28                37
 08/06/2025   07:11:14   ( -69.99,-111.34) 08/06/2025   07:10:39  ( -70.00,-111.33)    1.99                35
 08/08/2025   21:46:53   ( -70.70,  28.69) 08/08/2025   21:48:03  ( -70.59,  30.13)   54.72                70
 08/08/2025   22:37:26   (  70.05,-162.97) 08/08/2025   22:37:38  (  70.03,-163.03)    2.36                12
 08/08/2025   23:28:08   ( -69.92,   4.54) 08/08/2025   23:27:08  ( -69.93,   4.46)    3.38                60
 08/11/2025   14:03:37   ( -70.11, 145.39) 08/11/2025   14:04:39  ( -70.11, 145.33)    2.25                62
 08/11/2025   14:54:20   (  69.98, -47.11) 08/11/2025   14:54:06  (  70.00, -47.19)    3.30                14
 08/11/2025   15:44:54   ( -69.43, 121.03) 08/11/2025   15:43:44  ( -69.46, 119.70)   51.81                70