Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 9 10.  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)
 09/12/2025   14:03:40   ( -70.79, 144.35) 09/12/2025   14:04:49  ( -70.67, 146.09)   65.27                69
 09/12/2025   14:54:12   (  70.05, -47.17) 09/12/2025   14:54:25  (  70.07, -47.14)    2.74                13
 09/12/2025   15:44:54   ( -69.96, 120.28) 09/12/2025   15:43:55  ( -69.97, 120.34)    2.28                59
 09/15/2025   06:20:21   ( -70.13, -98.82) 09/15/2025   06:21:30  ( -70.12, -98.85)    1.13                69
 09/15/2025   07:11:05   (  70.01,  68.66) 09/15/2025   07:10:57  (  70.01,  68.64)    0.66                 8
 09/15/2025   08:01:42   ( -69.66,-123.49) 09/15/2025   08:00:30  ( -69.74,-124.10)   25.20                72
 09/17/2025   22:37:14   ( -70.10,  17.01) 09/17/2025   22:38:01  ( -70.10,  17.00)    0.76                47
 09/17/2025   23:27:58   (  69.98,-175.51) 09/17/2025   23:27:28  (  69.99,-175.51)    0.93                30
 09/20/2025   14:03:41   (  71.05, -36.07) 09/20/2025   14:04:47  (  70.93, -33.52)   93.53                66
 09/20/2025   14:54:06   ( -70.07, 132.82) 09/20/2025   14:54:31  ( -70.07, 132.83)    0.51                25
 09/20/2025   15:44:50   (  69.95, -59.69) 09/20/2025   15:43:58  (  69.95, -59.69)    0.48                52
 09/23/2025   06:20:19   (  70.24,  81.02) 09/23/2025   06:21:30  (  70.22,  81.29)   10.70                71
 09/23/2025   07:10:59   ( -70.05,-111.37) 09/23/2025   07:11:01  ( -70.07,-111.29)    3.51                 2
 09/23/2025   08:01:42   (  69.88,  56.20) 09/23/2025   08:00:29  (  69.90,  56.11)    3.63                73