Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 10 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)
 10/17/2025   07:10:34   (  70.08,  68.70) 10/17/2025   07:11:02  (  70.05,  68.68)    3.06                28
 10/17/2025   08:01:15   ( -69.97,-123.82) 10/17/2025   08:00:31  ( -69.99,-123.77)    2.89                44
 10/19/2025   22:36:46   ( -70.53,  16.48) 10/19/2025   22:37:57  ( -70.43,  17.47)   38.37                71
 10/19/2025   23:27:24   (  70.07,-175.50) 10/19/2025   23:27:29  (  70.05,-175.44)    3.20                 5
 10/20/2025   00:18:05   ( -69.96,  -8.01) 10/20/2025   00:16:59  ( -69.94,  -7.96)    3.26                66
 10/22/2025   14:53:29   ( -70.11, 132.93) 10/22/2025   14:54:30  ( -70.13, 132.92)    2.67                61
 10/22/2025   15:44:14   (  70.02, -59.63) 10/22/2025   15:43:57  (  70.02, -59.59)    1.33                17
 10/22/2025   16:34:45   ( -69.38, 108.64) 10/22/2025   16:33:35  ( -69.47, 107.29)   53.77                70
 10/25/2025   07:10:19   ( -70.06,-111.20) 10/25/2025   07:10:58  ( -70.07,-111.27)    3.09                39
 10/25/2025   08:01:04   (  69.97,  56.23) 10/25/2025   08:00:25  (  69.96,  56.22)    1.65                39
 10/27/2025   22:36:38   (  70.67,-163.69) 10/27/2025   22:37:47  (  70.59,-162.26)   53.48                69
 10/27/2025   23:27:10   ( -70.07,   4.57) 10/27/2025   23:27:25  ( -70.05,   4.58)    3.05                15
 10/28/2025   00:17:54   (  69.94, 172.07) 10/28/2025   00:16:52  (  69.93, 172.06)    1.39                62