Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 8 31.  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)
 09/01/2025   22:37:22   ( -70.09,  16.98) 09/01/2025   22:37:55  ( -70.08,  16.99)    1.05                33
 09/01/2025   23:28:06   (  69.99,-175.57) 09/01/2025   23:27:22  (  69.98,-175.51)    2.48                44
 09/04/2025   14:03:40   (  70.51, -35.21) 09/04/2025   14:04:51  (  70.41, -34.29)   35.91                71
 09/04/2025   14:54:15   ( -70.03, 132.85) 09/04/2025   14:54:26  ( -70.03, 132.79)    2.07                11
 09/04/2025   15:44:59   (  69.93, -59.70) 09/04/2025   15:43:53  (  69.92, -59.71)    1.00                66
 09/07/2025   06:20:26   (  70.08,  81.22) 09/07/2025   06:21:26  (  70.10,  81.14)    3.60                60
 09/07/2025   07:11:08   ( -69.98,-111.30) 09/07/2025   07:10:56  ( -70.00,-111.37)    3.37                12
 09/07/2025   08:01:41   (  69.30,  57.01) 09/07/2025   08:00:32  (  69.39,  55.44)   62.34                69
 09/09/2025   22:37:19   (  70.10,-163.02) 09/09/2025   22:37:54  (  70.09,-162.99)    1.21                35
 09/09/2025   23:28:01   ( -69.99,   4.46) 09/09/2025   23:27:24  ( -69.98,   4.49)    1.52                37
 09/12/2025   14:03:39   ( -70.74, 144.43) 09/12/2025   14:04:48  ( -70.59, 145.98)   59.50                69
 09/12/2025   14:54:12   (  70.06, -47.19) 09/12/2025   14:54:23  (  70.04, -47.18)    2.66                11
 09/12/2025   15:44:54   ( -69.96, 120.28) 09/12/2025   15:43:53  ( -69.94, 120.31)    2.83                61