Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 9 23.  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)
 09/25/2025   22:37:10   (  70.13,-163.04) 09/25/2025   22:38:01  (  70.12,-162.97)    2.81                51
 09/25/2025   23:27:51   ( -70.01,   4.47) 09/25/2025   23:27:31  ( -70.01,   4.50)    1.11                20
 09/26/2025   00:18:19   (  69.03, 173.20) 09/26/2025   00:17:13  (  69.07, 170.89)   92.25                66
 09/28/2025   14:54:02   (  70.09, -47.18) 09/28/2025   14:54:30  (  70.09, -47.14)    1.66                28
 09/28/2025   15:44:43   ( -69.96, 120.32) 09/28/2025   15:44:00  ( -69.97, 120.34)    1.29                43
 10/01/2025   06:20:16   ( -70.50, -99.35) 10/01/2025   06:21:27  ( -70.39, -98.45)   35.45                71
 10/01/2025   07:10:54   (  70.05,  68.65) 10/01/2025   07:10:58  (  70.07,  68.72)    3.14                 4
 10/01/2025   08:01:35   ( -69.93,-123.84) 10/01/2025   08:00:29  ( -69.90,-123.87)    3.03                66
 10/03/2025   22:37:00   ( -70.11,  17.05) 10/03/2025   22:37:58  ( -70.12,  17.05)    1.89                58
 10/03/2025   23:27:45   (  70.03,-175.52) 10/03/2025   23:27:25  (  70.01,-175.47)    2.82                20
 10/04/2025   00:18:14   ( -69.27,  -7.10) 10/04/2025   00:17:05  ( -69.35,  -8.73)   64.96                69
 10/06/2025   14:53:52   ( -70.09, 132.85) 10/06/2025   14:54:25  ( -70.09, 132.89)    1.50                33
 10/06/2025   15:44:36   (  69.96, -59.64) 10/06/2025   15:43:52  (  69.97, -59.63)    1.21                44