Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 10 6.  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)
 10/06/2025   14:53:52   ( -70.11, 132.83) 10/06/2025   14:54:33  ( -70.09, 132.85)    2.12                41
 10/06/2025   15:44:36   (  69.96, -59.64) 10/06/2025   15:44:00  (  69.99, -59.65)    2.96                36
 10/09/2025   06:20:14   (  70.85,  80.10) 10/09/2025   06:21:22  (  70.75,  82.08)   72.97                68
 10/09/2025   07:10:42   ( -70.06,-111.31) 10/09/2025   07:11:03  ( -70.04,-111.34)    2.28                21
 10/09/2025   08:01:26   (  69.92,  56.21) 10/09/2025   08:00:30  (  69.94,  56.16)    3.04                56
 10/11/2025   22:36:52   (  70.14,-162.96) 10/11/2025   22:38:03  (  70.12,-162.98)    1.82                71
 10/11/2025   23:27:33   ( -70.02,   4.53) 10/11/2025   23:27:33  ( -70.01,   4.50)    1.54                 0
 10/12/2025   00:18:14   (  69.72, 172.29) 10/12/2025   00:17:02  (  69.79, 171.84)   18.95                72
 10/14/2025   14:53:43   (  70.11, -47.14) 10/14/2025   14:54:32  (  70.11, -47.11)    0.92                49
 10/14/2025   15:44:24   ( -70.00, 120.36) 10/14/2025   15:44:02  ( -70.01, 120.37)    1.02                22
 10/14/2025   16:34:51   (  68.95, -70.83) 10/14/2025   16:33:45  (  69.01, -73.32)   99.67                66
 10/17/2025   07:10:33   (  70.05,  68.76) 10/17/2025   07:11:01  (  70.06,  68.71)    2.69                28
 10/17/2025   08:01:15   ( -69.98,-123.83) 10/17/2025   08:00:31  ( -69.96,-123.80)    2.48                44
 10/19/2025   22:36:46   ( -70.54,  16.46) 10/19/2025   22:37:56  ( -70.43,  17.48)   39.90                70
 10/19/2025   23:27:23   (  70.04,-175.45) 10/19/2025   23:27:28  (  70.04,-175.44)    0.71                 5
 10/20/2025   00:18:04   ( -69.92,  -7.95) 10/20/2025   00:16:58  ( -69.94,  -7.95)    1.49                66