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)
 09/23/2025   06:20:20   (  70.28,  80.96) 09/23/2025   06:21:30  (  70.25,  81.33)   14.30                70
 09/23/2025   07:10:59   ( -70.05,-111.36) 09/23/2025   07:11:02  ( -70.03,-111.36)    2.31                 3
 09/23/2025   08:01:42   (  69.86,  56.22) 09/23/2025   08:00:30  (  69.87,  56.07)    5.82                72
 09/25/2025   22:37:10   (  70.11,-163.00) 09/25/2025   22:38:02  (  70.11,-163.00)    0.26                52
 09/25/2025   23:27:51   ( -69.98,   4.52) 09/25/2025   23:27:32  ( -70.00,   4.48)    2.12                19
 09/26/2025   00:18:20   (  69.05, 173.17) 09/26/2025   00:17:13  (  69.12, 170.94)   88.71                67
 09/28/2025   14:54:01   (  70.05, -47.12) 09/28/2025   14:54:31  (  70.05, -47.19)    2.63                30
 09/28/2025   15:44:43   ( -69.97, 120.31) 09/28/2025   15:44:00  ( -70.00, 120.37)    3.40                43
 10/01/2025   06:20:17   ( -70.54, -99.43) 10/01/2025   06:21:28  ( -70.41, -98.43)   39.82                71
 10/01/2025   07:10:54   (  70.05,  68.66) 10/01/2025   07:11:00  (  70.02,  68.66)    2.66                 6
 10/01/2025   08:01:35   ( -69.92,-123.83) 10/01/2025   08:00:30  ( -69.92,-123.86)    1.00                65
 10/03/2025   22:37:02   ( -70.13,  17.01) 10/03/2025   22:38:01  ( -70.14,  17.07)    2.72                59
 10/03/2025   23:27:46   (  70.00,-175.49) 10/03/2025   23:27:29  (  69.97,-175.53)    3.29                17
 10/04/2025   00:18:17   ( -69.35,  -7.21) 10/04/2025   00:17:07  ( -69.43,  -8.64)   56.77                70