Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 12 3.  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)
 12/04/2025   06:20:19   ( -70.40, -99.17) 12/04/2025   06:21:30  ( -70.29, -98.63)   23.57                71
 12/04/2025   07:10:58   (  70.03,  68.70) 12/04/2025   07:11:00  (  70.02,  68.64)    2.79                 2
 12/04/2025   08:01:41   ( -69.98,-123.89) 12/04/2025   08:00:29  ( -69.96,-123.81)    3.26                72
 12/06/2025   22:37:13   ( -70.09,  17.06) 12/06/2025   22:38:00  ( -70.11,  17.00)    3.15                47
 12/06/2025   23:27:57   (  70.00,-175.48) 12/06/2025   23:27:27  (  70.00,-175.51)    1.15                30
 12/09/2025   14:03:40   (  70.70, -35.47) 12/09/2025   14:04:49  (  70.61, -34.02)   54.53                69
 12/09/2025   14:54:12   ( -70.05, 132.88) 12/09/2025   14:54:27  ( -70.06, 132.82)    2.27                15
 12/09/2025   15:44:56   (  69.97, -59.68) 12/09/2025   15:43:54  (  69.95, -59.69)    2.15                62
 12/12/2025   06:20:28   (  70.16,  81.16) 12/12/2025   06:21:22  (  70.14,  81.19)    2.19                54
 12/12/2025   07:11:10   ( -70.03,-111.32) 12/12/2025   07:10:52  ( -70.03,-111.33)    0.41                18
 12/12/2025   08:01:39   (  69.15,  57.27) 12/12/2025   08:00:32  (  69.20,  55.19)   82.47                67
 12/14/2025   21:47:00   ( -71.11,  28.06) 12/14/2025   21:48:06  ( -71.01,  30.75)   97.61                66
 12/14/2025   22:37:26   (  70.09,-162.98) 12/14/2025   22:37:48  (  70.08,-162.99)    1.15                22
 12/14/2025   23:28:08   ( -69.96,   4.54) 12/14/2025   23:27:18  ( -69.97,   4.49)    2.78                50