Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 9 7.  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)
 09/07/2025   06:20:27   (  70.14,  81.14) 09/07/2025   06:21:26  (  70.11,  81.15)    3.07                59
 09/07/2025   07:11:08   ( -69.98,-111.31) 09/07/2025   07:10:56  ( -69.99,-111.38)    2.87                12
 09/07/2025   08:01:42   (  69.35,  56.93) 09/07/2025   08:00:32  (  69.40,  55.45)   58.58                70
 09/09/2025   22:37:19   (  70.09,-163.01) 09/09/2025   22:37:54  (  70.10,-162.98)    2.06                35
 09/09/2025   23:28:01   ( -69.99,   4.46) 09/09/2025   23:27:24  ( -69.99,   4.50)    1.62                37
 09/12/2025   14:03:39   ( -70.73, 144.44) 09/12/2025   14:04:48  ( -70.61, 146.01)   59.37                69
 09/12/2025   14:54:12   (  70.05, -47.17) 09/12/2025   14:54:23  (  70.07, -47.14)    2.73                11
 09/12/2025   15:44:54   ( -69.95, 120.29) 09/12/2025   15:43:53  ( -69.96, 120.34)    2.07                61
 09/15/2025   06:20:21   ( -70.12, -98.82) 09/15/2025   06:21:25  ( -70.12, -98.83)    0.62                64
 09/15/2025   07:11:05   (  70.02,  68.66) 09/15/2025   07:10:52  (  70.01,  68.66)    0.68                13
 09/15/2025   08:01:39   ( -69.50,-123.26) 09/15/2025   08:00:28  ( -69.57,-124.31)   41.61                71
 09/17/2025   22:37:14   ( -70.10,  17.00) 09/17/2025   22:37:53  ( -70.09,  17.02)    1.31                39
 09/17/2025   23:27:58   (  69.99,-175.52) 09/17/2025   23:27:20  (  69.98,-175.49)    1.79                38
 09/20/2025   14:03:33   (  70.64, -35.40) 09/20/2025   14:04:43  (  70.52, -34.10)   50.22                70
 09/20/2025   14:54:05   ( -70.03, 132.89) 09/20/2025   14:54:20  ( -70.03, 132.83)    2.36                15
 09/20/2025   15:44:49   (  69.91, -59.63) 09/20/2025   15:43:47  (  69.91, -59.69)    2.15                62