Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 6 16.  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)
 06/16/2025   14:03:22   (  70.15, -34.60) 06/16/2025   14:04:28  (  70.15, -34.67)    2.82                66
 06/16/2025   14:54:04   ( -70.09, 132.81) 06/16/2025   14:53:57  ( -70.09, 132.88)    2.75                 7
 06/16/2025   15:44:41   (  69.57, -59.10) 06/16/2025   15:43:30  (  69.66, -60.08)   39.02                71
 06/19/2025   06:20:18   (  70.16,  81.15) 06/19/2025   06:20:58  (  70.14,  81.19)    3.12                40
 06/19/2025   07:10:59   ( -70.05,-111.36) 06/19/2025   07:10:28  ( -70.03,-111.33)    2.56                31
 06/21/2025   21:46:43   ( -70.95,  28.33) 06/21/2025   21:47:50  ( -70.87,  30.52)   80.08                67
 06/21/2025   22:37:14   (  70.13,-163.04) 06/21/2025   22:37:29  (  70.11,-162.97)    3.36                15
 06/21/2025   23:27:55   ( -70.01,   4.46) 06/21/2025   23:26:59  ( -70.01,   4.52)    2.40                56
 06/24/2025   14:03:25   ( -70.19, 145.33) 06/24/2025   14:04:33  ( -70.18, 145.37)    1.70                68
 06/24/2025   14:54:09   (  70.05, -47.15) 06/24/2025   14:54:00  (  70.07, -47.15)    2.08                 9
 06/24/2025   15:44:46   ( -69.72, 120.66) 06/24/2025   15:43:34  ( -69.75, 120.04)   24.46                72
 06/27/2025   06:20:20   ( -70.11, -98.79) 06/27/2025   06:21:04  ( -70.12, -98.84)    2.35                44
 06/27/2025   07:11:05   (  70.03,  68.64) 06/27/2025   07:10:31  (  70.01,  68.65)    2.47                34
 06/29/2025   21:46:45   (  70.80,-151.44) 06/29/2025   21:47:54  (  70.69,-149.75)   63.15                69
 06/29/2025   22:37:15   ( -70.09,  17.01) 06/29/2025   22:37:33  ( -70.10,  17.02)    1.36                18
 06/29/2025   23:27:59   (  69.96,-175.49) 06/29/2025   23:27:00  (  69.98,-175.51)    2.48                59