Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 11 13.  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)
 11/15/2025   14:53:28   (  70.10, -47.04) 11/15/2025   14:54:27  (  70.11, -47.10)    2.50                59
 11/15/2025   15:44:10   ( -70.02, 120.40) 11/15/2025   15:43:57  ( -70.00, 120.37)    2.53                13
 11/15/2025   16:34:43   (  69.30, -71.24) 11/15/2025   16:33:34  (  69.34, -72.88)   64.74                69
 11/18/2025   07:10:28   (  70.06,  68.77) 11/18/2025   07:10:53  (  70.08,  68.74)    1.81                25
 11/18/2025   08:01:10   ( -69.97,-123.78) 11/18/2025   08:00:23  ( -69.97,-123.78)    0.73                47
 11/20/2025   22:36:44   ( -70.15,  17.07) 11/20/2025   22:37:51  ( -70.16,  17.12)    2.04                67
 11/20/2025   23:27:28   (  70.04,-175.44) 11/20/2025   23:27:18  (  70.05,-175.40)    2.10                10
 11/21/2025   00:18:04   ( -69.63,  -7.51) 11/21/2025   00:16:52  ( -69.72,  -8.22)   29.52                72
 11/23/2025   14:53:43   ( -70.09, 132.93) 11/23/2025   14:54:16  ( -70.09, 132.92)    0.68                33
 11/23/2025   15:44:27   (  69.98, -59.60) 11/23/2025   15:43:43  (  69.98, -59.60)    0.38                44
 11/26/2025   06:19:59   (  70.15,  81.28) 11/26/2025   06:21:09  (  70.14,  81.26)    1.49                70
 11/26/2025   07:10:41   ( -70.04,-111.24) 11/26/2025   07:10:39  ( -70.03,-111.26)    1.07                 2
 11/26/2025   08:01:21   (  69.72,  56.54) 11/26/2025   08:00:09  (  69.75,  55.99)   21.46                72