Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 7 21.  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   (  70.12,  81.16) 07/21/2025   06:21:10  (  70.11,  81.16)    0.78                40
 07/21/2025   07:11:12   ( -70.02,-111.38) 07/21/2025   07:10:40  ( -70.00,-111.36)    2.59                32
 07/23/2025   21:46:55   ( -70.91,  28.35) 07/23/2025   21:48:02  ( -70.81,  30.43)   76.90                67
 07/23/2025   22:37:25   (  70.08,-163.01) 07/23/2025   22:37:41  (  70.05,-163.04)    3.37                16
 07/23/2025   23:28:07   ( -69.97,   4.46) 07/23/2025   23:27:10  ( -69.99,   4.51)    3.04                57
 07/26/2025   14:03:36   ( -70.13, 145.36) 07/26/2025   14:04:44  ( -70.13, 145.32)    1.73                68
 07/26/2025   14:54:20   (  70.04, -47.18) 07/26/2025   14:54:11  (  70.03, -47.19)    1.36                 9
 07/26/2025   15:44:57   ( -69.66, 120.69) 07/26/2025   15:43:45  ( -69.70, 119.99)   27.59                72
 07/29/2025   06:20:30   ( -70.09, -98.81) 07/29/2025   06:21:13  ( -70.10, -98.85)    1.91                43
 07/29/2025   07:11:14   (  70.00,  68.64) 07/29/2025   07:10:40  (  69.99,  68.64)    1.45                34
 07/31/2025   21:46:55   (  70.81,-151.49) 07/31/2025   21:48:03  (  70.70,-149.71)   66.29                68
 07/31/2025   22:37:25   ( -70.05,  17.02) 07/31/2025   22:37:43  ( -70.05,  16.97)    1.99                18
 07/31/2025   23:28:09   (  69.97,-175.54) 07/31/2025   23:27:10  (  69.94,-175.55)    3.57                59
 08/03/2025   14:03:38   (  70.15, -34.67) 08/03/2025   14:04:42  (  70.14, -34.65)    0.87                64
 08/03/2025   14:54:20   ( -70.02, 132.84) 08/03/2025   14:54:12  ( -70.04, 132.84)    2.89                 8
 08/03/2025   15:44:56   (  69.52, -59.10) 08/03/2025   15:43:45  (  69.60, -60.14)   41.05                71