Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 6 11.  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)
 06/11/2025   06:20:11   ( -70.13, -98.78) 06/11/2025   06:20:53  ( -70.16, -98.76)    3.28                42
 06/11/2025   07:10:56   (  70.03,  68.68) 06/11/2025   07:10:21  (  70.01,  68.66)    2.73                35
 06/13/2025   21:46:38   (  70.82,-151.44) 06/13/2025   21:47:46  (  70.75,-149.66)   65.66                68
 06/13/2025   22:37:07   ( -70.08,  17.06) 06/13/2025   22:37:26  ( -70.09,  17.01)    2.42                19
 06/13/2025   23:27:52   (  69.98,-175.48) 06/13/2025   23:26:53  (  69.99,-175.49)    0.82                59
 06/16/2025   14:03:22   (  70.14, -34.59) 06/16/2025   14:04:28  (  70.17, -34.65)    3.09                66
 06/16/2025   14:54:04   ( -70.08, 132.82) 06/16/2025   14:53:58  ( -70.06, 132.84)    2.59                 6
 06/16/2025   15:44:42   (  69.62, -59.18) 06/16/2025   15:43:30  (  69.68, -60.05)   34.40                72
 06/19/2025   06:20:17   (  70.10,  81.23) 06/19/2025   06:20:59  (  70.12,  81.16)    3.17                42
 06/19/2025   07:10:59   ( -70.04,-111.35) 06/19/2025   07:10:29  ( -70.01,-111.35)    2.54                30
 06/21/2025   21:46:44   ( -70.99,  28.27) 06/21/2025   21:47:51  ( -70.87,  30.52)   82.81                67
 06/21/2025   22:37:14   (  70.12,-163.03) 06/21/2025   22:37:30  (  70.11,-162.97)    2.32                16
 06/21/2025   23:27:55   ( -70.00,   4.48) 06/21/2025   23:27:00  ( -70.01,   4.52)    2.06                55
 06/24/2025   14:03:25   ( -70.17, 145.36) 06/24/2025   14:04:35  ( -70.15, 145.31)    2.80                70
 06/24/2025   14:54:09   (  70.03, -47.13) 06/24/2025   14:54:02  (  70.03, -47.21)    2.89                 7
 06/24/2025   15:44:47   ( -69.75, 120.61) 06/24/2025   15:43:34  ( -69.82, 120.14)   20.16                73