Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 7 12.  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)
 07/13/2025   06:20:27   ( -70.13, -98.85) 07/13/2025   06:21:08  ( -70.10, -98.85)    3.59                41
 07/13/2025   07:11:11   (  70.01,  68.65) 07/13/2025   07:10:35  (  70.00,  68.64)    1.42                36
 07/15/2025   21:46:52   (  70.79,-151.45) 07/15/2025   21:48:00  (  70.69,-149.74)   63.92                68
 07/15/2025   22:37:22   ( -70.07,  17.01) 07/15/2025   22:37:39  ( -70.09,  17.02)    2.75                17
 07/15/2025   23:28:06   (  69.95,-175.50) 07/15/2025   23:27:07  (  69.93,-175.57)    3.46                59
 07/18/2025   14:03:35   (  70.16, -34.68) 07/18/2025   14:04:40  (  70.13, -34.69)    3.64                65
 07/18/2025   14:54:16   ( -70.01, 132.87) 07/18/2025   14:54:10  ( -70.03, 132.80)    3.30                 6
 07/18/2025   15:44:53   (  69.53, -59.11) 07/18/2025   15:43:43  (  69.59, -60.17)   41.51                70
 07/21/2025   06:20:30   (  70.11,  81.16) 07/21/2025   06:21:11  (  70.11,  81.16)    0.70                41
 07/21/2025   07:11:12   ( -70.01,-111.36) 07/21/2025   07:10:41  ( -70.01,-111.35)    0.33                31
 07/23/2025   21:46:56   ( -70.95,  28.28) 07/23/2025   21:48:03  ( -70.85,  30.49)   81.04                67
 07/23/2025   22:37:25   (  70.07,-163.00) 07/23/2025   22:37:42  (  70.08,-163.00)    1.16                17
 07/23/2025   23:28:07   ( -69.96,   4.49) 07/23/2025   23:27:12  ( -69.98,   4.49)    2.97                55