Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 7 28.  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, -98.84) 07/29/2025   06:21:13  ( -70.11, -98.83)    0.60                42
 07/29/2025   07:11:15   (  70.02,  68.62) 07/29/2025   07:10:40  (  70.01,  68.67)    2.11                35
 07/31/2025   21:46:54   (  70.78,-151.44) 07/31/2025   21:48:02  (  70.70,-149.71)   63.98                68
 07/31/2025   22:37:25   ( -70.08,  16.98) 07/31/2025   22:37:41  ( -70.10,  17.04)    2.92                16
 07/31/2025   23:28:08   (  69.94,-175.49) 07/31/2025   23:27:09  (  69.94,-175.55)    2.03                59
 08/03/2025   14:03:37   (  70.12, -34.63) 08/03/2025   14:04:41  (  70.12, -34.68)    1.73                64
 08/03/2025   14:54:19   ( -70.00, 132.87) 08/03/2025   14:54:11  ( -70.02, 132.80)    2.73                 8
 08/03/2025   15:44:55   (  69.49, -59.07) 08/03/2025   15:43:44  (  69.57, -60.16)   43.49                71
 08/06/2025   06:20:32   (  70.11,  81.16) 08/06/2025   06:21:09  (  70.13,  81.22)    2.93                37
 08/06/2025   07:11:14   ( -69.98,-111.33) 08/06/2025   07:10:40  ( -69.97,-111.38)    2.32                34
 08/08/2025   21:46:54   ( -70.75,  28.60) 08/08/2025   21:48:03  ( -70.61,  30.17)   59.66                69
 08/08/2025   22:37:26   (  70.05,-162.97) 08/08/2025   22:37:38  (  70.06,-162.99)    1.63                12
 08/08/2025   23:28:09   ( -69.97,   4.46) 08/08/2025   23:27:08  ( -69.96,   4.50)    1.89                61