Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 7 27.  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)
 07/29/2025   06:20:31   ( -70.11, -98.83) 07/29/2025   06:21:13  ( -70.12, -98.82)    1.12                42
 07/29/2025   07:11:15   (  70.01,  68.63) 07/29/2025   07:10:40  (  70.01,  68.67)    1.83                35
 07/31/2025   21:46:54   (  70.77,-151.43) 07/31/2025   21:48:03  (  70.65,-149.78)   61.79                69
 07/31/2025   22:37:25   ( -70.08,  16.99) 07/31/2025   22:37:42  ( -70.05,  16.97)    2.65                17
 07/31/2025   23:28:08   (  69.93,-175.48) 07/31/2025   23:27:09  (  69.94,-175.54)    2.52                59
 08/03/2025   14:03:37   (  70.12, -34.62) 08/03/2025   14:04:41  (  70.13, -34.67)    2.31                64
 08/03/2025   14:54:20   ( -70.05, 132.80) 08/03/2025   14:54:11  ( -70.02, 132.81)    2.82                 9
 08/03/2025   15:44:55   (  69.48, -59.06) 08/03/2025   15:43:45  (  69.52, -60.23)   45.90                70
 08/06/2025   06:20:32   (  70.10,  81.18) 08/06/2025   06:21:10  (  70.08,  81.14)    2.74                38
 08/06/2025   07:11:14   ( -69.97,-111.32) 08/06/2025   07:10:40  ( -69.97,-111.37)    2.00                34
 08/08/2025   21:46:54   ( -70.74,  28.63) 08/08/2025   21:48:03  ( -70.61,  30.17)   58.61                69
 08/08/2025   22:37:27   (  70.08,-163.03) 08/08/2025   22:37:38  (  70.06,-162.99)    3.20                11
 08/08/2025   23:28:09   ( -69.95,   4.48) 08/08/2025   23:27:08  ( -69.96,   4.50)    1.06                61