Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 11 8.  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)
 11/10/2025   07:10:10   ( -70.09,-111.20) 11/10/2025   07:11:03  ( -70.10,-111.26)    2.57                53
 11/10/2025   08:00:55   (  70.00,  56.24) 11/10/2025   08:00:30  (  70.00,  56.24)    0.36                25
 11/10/2025   08:51:21   ( -69.08,-135.11) 11/10/2025   08:50:14  ( -69.12,-137.32)   87.93                67
 11/12/2025   22:36:42   (  70.88,-164.03) 11/12/2025   22:37:49  (  70.78,-162.01)   74.86                67
 11/12/2025   23:27:10   ( -70.06,   4.59) 11/12/2025   23:27:30  ( -70.07,   4.58)    0.57                20
 11/13/2025   00:17:55   (  69.98, 172.02) 11/13/2025   00:16:57  (  69.96, 172.07)    3.33                58
 11/15/2025   14:53:29   (  70.13, -47.09) 11/15/2025   14:54:27  (  70.15, -47.04)    2.89                58
 11/15/2025   15:44:11   ( -70.05, 120.36) 11/15/2025   15:43:57  ( -70.05, 120.44)    2.90                14
 11/15/2025   16:34:43   (  69.28, -71.21) 11/15/2025   16:33:34  (  69.38, -72.83)   64.53                69
 11/18/2025   07:10:29   (  70.08,  68.74) 11/18/2025   07:10:54  (  70.10,  68.77)    1.93                25
 11/18/2025   08:01:11   ( -69.99,-123.80) 11/18/2025   08:00:24  ( -69.99,-123.75)    2.06                47
 11/20/2025   22:36:45   ( -70.15,  17.07) 11/20/2025   22:37:53  ( -70.18,  17.13)    3.29                68
 11/20/2025   23:27:29   (  70.04,-175.45) 11/20/2025   23:27:20  (  70.06,-175.39)    2.87                 9
 11/21/2025   00:18:06   ( -69.68,  -7.58) 11/21/2025   00:16:54  ( -69.74,  -8.21)   24.84                72