Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 6 24.  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)
 06/24/2025   14:03:25   ( -70.18, 145.34) 06/24/2025   14:04:33  ( -70.18, 145.38)    1.51                68
 06/24/2025   14:54:09   (  70.03, -47.13) 06/24/2025   14:54:01  (  70.03, -47.20)    2.81                 8
 06/24/2025   15:44:46   ( -69.71, 120.67) 06/24/2025   15:43:34  ( -69.75, 120.05)   24.69                72
 06/27/2025   06:20:21   ( -70.15, -98.84) 06/27/2025   06:21:04  ( -70.14, -98.81)    1.62                43
 06/27/2025   07:11:05   (  70.00,  68.68) 06/27/2025   07:10:31  (  70.03,  68.68)    3.20                34
 06/29/2025   21:46:46   (  70.82,-151.47) 06/29/2025   21:47:54  (  70.73,-149.69)   65.94                68
 06/29/2025   22:37:15   ( -70.06,  17.05) 06/29/2025   22:37:34  ( -70.08,  16.98)    2.97                19
 06/29/2025   23:28:00   (  69.98,-175.52) 06/29/2025   23:27:01  (  69.97,-175.53)    1.21                59
 07/02/2025   14:03:30   (  70.16, -34.66) 07/02/2025   14:04:34  (  70.16, -34.65)    0.53                64
 07/02/2025   14:54:11   ( -70.03, 132.86) 07/02/2025   14:54:04  ( -70.06, 132.84)    2.83                 7
 07/02/2025   15:44:48   (  69.53, -59.09) 07/02/2025   15:43:37  (  69.61, -60.13)   41.60                71
 07/05/2025   06:20:26   (  70.14,  81.14) 07/05/2025   06:21:04  (  70.12,  81.18)    2.73                38
 07/05/2025   07:11:07   ( -70.01,-111.34) 07/05/2025   07:10:34  ( -70.02,-111.33)    2.04                33
 07/07/2025   21:46:49   ( -70.82,  28.52) 07/07/2025   21:47:58  ( -70.68,  30.24)   64.95                69
 07/07/2025   22:37:21   (  70.07,-162.99) 07/07/2025   22:37:34  (  70.07,-163.00)    0.63                13
 07/07/2025   23:28:03   ( -69.98,   4.47) 07/07/2025   23:27:04  ( -69.98,   4.49)    1.07                59