Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 8 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)
 08/30/2025   06:20:29   ( -70.13, -98.86) 08/30/2025   06:21:24  ( -70.13, -98.82)    1.46                55
 08/30/2025   07:11:12   (  69.99,  68.67) 08/30/2025   07:10:52  (  69.97,  68.60)    3.16                20
 08/30/2025   08:01:41   ( -69.19,-122.85) 08/30/2025   08:00:33  ( -69.26,-124.74)   75.07                68
 09/01/2025   22:37:22   ( -70.05,  17.03) 09/01/2025   22:37:56  ( -70.07,  16.97)    2.87                34
 09/01/2025   23:28:06   (  69.96,-175.52) 09/01/2025   23:27:23  (  69.96,-175.54)    0.81                43
 09/04/2025   14:03:40   (  70.52, -35.23) 09/04/2025   14:04:51  (  70.42, -34.28)   36.94                71
 09/04/2025   14:54:15   ( -70.04, 132.83) 09/04/2025   14:54:26  ( -70.04, 132.80)    1.24                11
 09/04/2025   15:44:59   (  69.94, -59.71) 09/04/2025   15:43:53  (  69.93, -59.71)    1.49                66
 09/07/2025   06:20:27   (  70.13,  81.14) 09/07/2025   06:21:26  (  70.15,  81.20)    2.46                59
 09/07/2025   07:11:09   ( -70.02,-111.37) 09/07/2025   07:10:56  ( -70.04,-111.31)    3.06                13
 09/07/2025   08:01:42   (  69.35,  56.93) 09/07/2025   08:00:33  (  69.38,  55.42)   59.49                69
 09/09/2025   22:37:20   (  70.07,-162.99) 09/09/2025   22:37:57  (  70.07,-163.03)    1.54                37
 09/09/2025   23:28:02   ( -69.96,   4.49) 09/09/2025   23:27:27  ( -69.97,   4.46)    1.29                35