Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 7 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)
 07/21/2025   06:20:30   (  70.09,  81.20) 07/21/2025   06:21:11  (  70.09,  81.13)    2.86                41
 07/21/2025   07:11:12   ( -69.99,-111.33) 07/21/2025   07:10:41  ( -69.98,-111.39)    2.90                31
 07/23/2025   21:46:54   ( -70.88,  28.40) 07/23/2025   21:48:02  ( -70.78,  30.40)   73.80                68
 07/23/2025   22:37:25   (  70.10,-163.04) 07/23/2025   22:37:40  (  70.08,-163.00)    2.70                15
 07/23/2025   23:28:07   ( -69.99,   4.43) 07/23/2025   23:27:10  ( -69.97,   4.48)    3.08                57
 07/26/2025   14:03:36   ( -70.15, 145.33) 07/26/2025   14:04:43  ( -70.17, 145.36)    2.05                67
 07/26/2025   14:54:20   (  70.06, -47.22) 07/26/2025   14:54:10  (  70.06, -47.15)    2.66                10
 07/26/2025   15:44:56   ( -69.63, 120.74) 07/26/2025   15:43:44  ( -69.73, 120.03)   29.53                72
 07/29/2025   06:20:31   ( -70.11, -98.84) 07/29/2025   06:21:13  ( -70.14, -98.80)    3.08                42
 07/29/2025   07:11:14   (  69.97,  68.68) 07/29/2025   07:10:41  (  69.97,  68.61)    2.92                33
 07/31/2025   21:46:56   (  70.83,-151.53) 07/31/2025   21:48:04  (  70.68,-149.74)   67.62                68
 07/31/2025   22:37:26   ( -70.08,  16.98) 07/31/2025   22:37:43  ( -70.09,  17.02)    2.17                17
 07/31/2025   23:28:10   (  69.99,-175.58) 07/31/2025   23:27:10  (  69.97,-175.50)    3.68                60