Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 9 20.  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)
 09/20/2025   14:03:41   (  71.03, -36.05) 09/20/2025   14:04:47  (  70.97, -33.47)   93.59                66
 09/20/2025   14:54:06   ( -70.06, 132.83) 09/20/2025   14:54:31  ( -70.08, 132.85)    2.49                25
 09/20/2025   15:44:50   (  69.94, -59.67) 09/20/2025   15:43:59  (  69.93, -59.72)    2.16                51
 09/23/2025   06:20:20   (  70.28,  80.96) 09/23/2025   06:21:31  (  70.20,  81.26)   14.32                71
 09/23/2025   07:10:59   ( -70.04,-111.36) 09/23/2025   07:11:02  ( -70.03,-111.35)    1.56                 3
 09/23/2025   08:01:42   (  69.86,  56.22) 09/23/2025   08:00:30  (  69.87,  56.07)    5.69                72
 09/25/2025   22:37:10   (  70.11,-162.99) 09/25/2025   22:38:02  (  70.12,-162.98)    1.64                52
 09/25/2025   23:27:52   ( -70.03,   4.44) 09/25/2025   23:27:32  ( -70.01,   4.50)    3.17                20
 09/26/2025   00:18:20   (  69.05, 173.17) 09/26/2025   00:17:13  (  69.13, 170.96)   88.30                67
 09/28/2025   14:54:02   (  70.10, -47.20) 09/28/2025   14:54:31  (  70.08, -47.16)    2.71                29
 09/28/2025   15:44:43   ( -69.97, 120.32) 09/28/2025   15:44:01  ( -69.97, 120.33)    0.49                42
 10/01/2025   06:20:18   ( -70.59, -99.50) 10/01/2025   06:21:28  ( -70.45, -98.37)   44.31                70
 10/01/2025   07:10:54   (  70.04,  68.67) 10/01/2025   07:11:01  (  70.01,  68.64)    3.24                 7
 10/01/2025   08:01:35   ( -69.91,-123.82) 10/01/2025   08:00:31  ( -69.91,-123.88)    2.14                64
 10/03/2025   22:37:02   ( -70.12,  17.02) 10/03/2025   22:38:03  ( -70.10,  17.00)    2.27                61
 10/03/2025   23:27:46   (  69.99,-175.47) 10/03/2025   23:27:30  (  69.98,-175.52)    1.82                16
 10/04/2025   00:18:18   ( -69.39,  -7.27) 10/04/2025   00:17:08  ( -69.44,  -8.63)   53.60                70