Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 12 4.  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)
 12/06/2025   22:37:13   ( -70.12,  17.02) 12/06/2025   22:38:03  ( -70.14,  17.03)    2.90                50
 12/06/2025   23:27:57   (  70.02,-175.52) 12/06/2025   23:27:30  (  70.04,-175.47)    2.73                27
 12/07/2025   00:18:22   ( -69.01,  -6.74) 12/07/2025   00:17:16  ( -69.05,  -9.17)   97.16                66
 12/09/2025   14:03:44   (  70.95, -35.87) 12/09/2025   14:04:51  (  70.86, -33.66)   81.00                67
 12/09/2025   14:54:12   ( -70.09, 132.82) 12/09/2025   14:54:33  ( -70.10, 132.84)    1.10                21
 12/09/2025   15:44:56   (  70.00, -59.73) 12/09/2025   15:44:00  (  69.99, -59.67)    2.77                56
 12/12/2025   06:20:28   (  70.15,  81.18) 12/12/2025   06:21:32  (  70.15,  81.17)    0.53                64
 12/12/2025   07:11:10   ( -70.02,-111.31) 12/12/2025   07:11:02  ( -70.04,-111.35)    3.01                 8
 12/12/2025   08:01:46   (  69.51,  56.76) 12/12/2025   08:00:36  (  69.54,  55.61)   44.82                70
 12/14/2025   22:37:26   (  70.09,-162.98) 12/14/2025   22:38:00  (  70.09,-163.03)    2.05                34
 12/14/2025   23:28:08   ( -70.01,   4.46) 12/14/2025   23:27:29  ( -69.98,   4.46)    3.27                39
 12/17/2025   14:03:44   ( -70.39, 145.01) 12/17/2025   14:04:56  ( -70.30, 145.53)   21.33                72
 12/17/2025   14:54:23   (  70.05, -47.15) 12/17/2025   14:54:25  (  70.08, -47.15)    3.10                 2
 12/17/2025   15:45:06   ( -69.97, 120.29) 12/17/2025   15:43:55  ( -69.97, 120.33)    1.94                71