Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 9 27.  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)
 09/28/2025   14:54:01   (  70.05, -47.13) 09/28/2025   14:54:30  (  70.07, -47.16)    2.38                29
 09/28/2025   15:44:42   ( -69.93, 120.37) 09/28/2025   15:44:00  ( -69.95, 120.31)    3.25                42
 10/01/2025   06:20:16   ( -70.52, -99.39) 10/01/2025   06:21:27  ( -70.37, -98.48)   37.40                71
 10/01/2025   07:10:54   (  70.07,  68.63) 10/01/2025   07:10:58  (  70.05,  68.70)    3.37                 4
 10/01/2025   08:01:35   ( -69.95,-123.88) 10/01/2025   08:00:28  ( -69.94,-123.83)    2.35                67
 10/03/2025   22:37:01   ( -70.13,  17.01) 10/03/2025   22:37:59  ( -70.10,  17.01)    3.50                58
 10/03/2025   23:27:45   (  69.99,-175.47) 10/03/2025   23:27:26  (  69.99,-175.50)    1.07                19
 10/04/2025   00:18:15   ( -69.29,  -7.13) 10/04/2025   00:17:06  ( -69.33,  -8.77)   64.52                69
 10/06/2025   14:53:51   ( -70.06, 132.90) 10/06/2025   14:54:25  ( -70.05, 132.84)    2.40                34
 10/06/2025   15:44:36   (  69.98, -59.67) 10/06/2025   15:43:51  (  70.00, -59.60)    3.43                45
 10/09/2025   06:20:07   (  70.44,  80.77) 10/09/2025   06:21:17  (  70.35,  81.53)   30.28                70
 10/09/2025   07:10:42   ( -70.01,-111.24) 10/09/2025   07:10:51  ( -70.02,-111.31)    3.14                 9
 10/09/2025   08:01:27   (  69.93,  56.20) 10/09/2025   08:00:18  (  69.91,  56.18)    2.10                69