Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 10 9.  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)
 10/09/2025   06:20:15   (  70.89,  80.05) 10/09/2025   06:21:22  (  70.77,  82.10)   76.18                67
 10/09/2025   07:10:42   ( -70.05,-111.29) 10/09/2025   07:11:03  ( -70.06,-111.32)    1.62                21
 10/09/2025   08:01:27   (  69.95,  56.16) 10/09/2025   08:00:30  (  69.96,  56.18)    1.04                57
 10/11/2025   22:36:53   (  70.17,-163.01) 10/11/2025   22:38:03  (  70.15,-162.94)    3.24                70
 10/11/2025   23:27:34   ( -70.06,   4.48) 10/11/2025   23:27:33  ( -70.04,   4.54)    3.09                 1
 10/12/2025   00:18:15   (  69.75, 172.24) 10/12/2025   00:17:02  (  69.82, 171.88)   15.93                73
 10/14/2025   14:53:43   (  70.08, -47.09) 10/14/2025   14:54:33  (  70.10, -47.12)    2.53                50
 10/14/2025   15:44:24   ( -69.97, 120.39) 10/14/2025   15:44:03  ( -70.00, 120.36)    2.95                21
 10/14/2025   16:34:52   (  68.98, -70.86) 10/14/2025   16:33:46  (  69.00, -73.33)   98.47                66
 10/17/2025   07:10:33   (  70.06,  68.73) 10/17/2025   07:11:01  (  70.09,  68.73)    2.87                28
 10/17/2025   08:01:15   ( -70.00,-123.86) 10/17/2025   08:00:31  ( -69.98,-123.78)    3.67                44
 10/19/2025   22:36:47   ( -70.55,  16.45) 10/19/2025   22:37:58  ( -70.43,  17.47)   40.38                71
 10/19/2025   23:27:24   (  70.05,-175.46) 10/19/2025   23:27:30  (  70.04,-175.44)    0.75                 6
 10/20/2025   00:18:05   ( -69.93,  -7.96) 10/20/2025   00:17:00  ( -69.94,  -7.95)    1.29                65
 10/22/2025   14:53:30   ( -70.12, 132.91) 10/22/2025   14:54:31  ( -70.15, 132.94)    3.16                61
 10/22/2025   15:44:14   (  69.99, -59.58) 10/22/2025   15:43:59  (  69.97, -59.65)    3.17                15
 10/22/2025   16:34:47   ( -69.44, 108.54) 10/22/2025   16:33:36  ( -69.49, 107.31)   48.17                71