Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 7 14.  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)
 07/15/2025   21:46:51   (  70.77,-151.42) 07/15/2025   21:48:00  (  70.65,-149.80)   60.84                69
 07/15/2025   22:37:22   ( -70.10,  16.96) 07/15/2025   22:37:38  ( -70.10,  17.03)    2.54                16
 07/15/2025   23:28:06   (  69.98,-175.55) 07/15/2025   23:27:05  (  70.00,-175.47)    3.38                61
 07/18/2025   14:03:35   (  70.14, -34.65) 07/18/2025   14:04:40  (  70.13, -34.69)    2.07                65
 07/18/2025   14:54:17   ( -70.04, 132.82) 07/18/2025   14:54:10  ( -70.02, 132.79)    2.49                 7
 07/18/2025   15:44:54   (  69.56, -59.16) 07/18/2025   15:43:43  (  69.58, -60.17)   39.34                71
 07/21/2025   06:20:30   (  70.10,  81.19) 07/21/2025   06:21:11  (  70.09,  81.13)    2.36                41
 07/21/2025   07:11:12   ( -69.99,-111.33) 07/21/2025   07:10:41  ( -69.99,-111.38)    1.83                31
 07/23/2025   21:46:55   ( -70.88,  28.39) 07/23/2025   21:48:03  ( -70.80,  30.42)   74.60                68
 07/23/2025   22:37:26   (  70.11,-163.06) 07/23/2025   22:37:41  (  70.09,-162.99)    3.27                15
 07/23/2025   23:28:07   ( -69.99,   4.43) 07/23/2025   23:27:10  ( -69.99,   4.51)    3.02                57
 07/26/2025   14:03:36   ( -70.15, 145.32) 07/26/2025   14:04:44  ( -70.14, 145.32)    1.61                68
 07/26/2025   14:54:19   (  70.01, -47.15) 07/26/2025   14:54:11  (  70.02, -47.20)    2.13                 8
 07/26/2025   15:44:57   ( -69.68, 120.66) 07/26/2025   15:43:45  ( -69.71, 119.99)   25.74                72