Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 5 31.  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)
 05/31/2025   14:03:11   (  70.20, -34.62) 05/31/2025   14:04:16  (  70.18, -34.60)    1.64                65
 05/31/2025   14:53:52   ( -70.08, 132.87) 05/31/2025   14:53:46  ( -70.07, 132.86)    1.69                 6
 05/31/2025   15:44:30   (  69.62, -59.13) 05/31/2025   15:43:19  (  69.64, -60.09)   37.33                71
 06/03/2025   06:20:07   (  70.12,  81.25) 06/03/2025   06:20:46  (  70.11,  81.17)    3.34                39
 06/03/2025   07:10:49   ( -70.06,-111.33) 06/03/2025   07:10:15  ( -70.05,-111.27)    2.57                34
 06/05/2025   21:46:30   ( -70.78,  28.67) 06/05/2025   21:47:39  ( -70.66,  30.23)   58.90                69
 06/05/2025   22:37:04   (  70.11,-162.97) 06/05/2025   22:37:14  (  70.12,-162.92)    2.27                10
 06/05/2025   23:27:45   ( -69.99,   4.53) 06/05/2025   23:26:44  ( -70.01,   4.56)    2.39                61
 06/08/2025   14:03:16   ( -70.19, 145.36) 06/08/2025   14:04:16  ( -70.17, 145.40)    2.58                60
 06/08/2025   14:54:00   (  70.05, -47.11) 06/08/2025   14:53:43  (  70.06, -47.12)    1.34                17
 06/08/2025   15:44:31   ( -69.40, 121.16) 06/08/2025   15:43:22  ( -69.46, 119.69)   58.05                69
 06/11/2025   06:20:11   ( -70.13, -98.79) 06/11/2025   06:20:43  ( -70.15, -98.75)    1.99                32
 06/11/2025   07:10:55   (  69.99,  68.74) 06/11/2025   07:10:11  (  69.98,  68.66)    3.40                44
 06/13/2025   21:46:28   (  70.31,-150.62) 06/13/2025   21:47:40  (  70.26,-150.33)   12.45                72
 06/13/2025   22:37:07   ( -70.08,  17.05) 06/13/2025   22:37:11  ( -70.10,  17.08)    2.37                 4
 06/13/2025   23:27:51   (  69.94,-175.43) 06/13/2025   23:26:39  (  69.93,-175.52)    3.66                72