Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 7 22.  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)
 07/23/2025   21:46:54   ( -70.89,  28.39) 07/23/2025   21:48:02  ( -70.78,  30.38)   73.97                68
 07/23/2025   22:37:24   (  70.05,-162.97) 07/23/2025   22:37:40  (  70.07,-163.01)    2.94                16
 07/23/2025   23:28:06   ( -69.95,   4.50) 07/23/2025   23:27:10  ( -69.96,   4.47)    2.06                56
 07/26/2025   14:03:36   ( -70.16, 145.32) 07/26/2025   14:04:43  ( -70.15, 145.35)    1.33                67
 07/26/2025   14:54:20   (  70.06, -47.22) 07/26/2025   14:54:10  (  70.05, -47.16)    3.06                10
 07/26/2025   15:44:56   ( -69.64, 120.73) 07/26/2025   15:43:44  ( -69.72, 120.01)   29.00                72
 07/29/2025   06:20:31   ( -70.12, -98.85) 07/29/2025   06:21:13  ( -70.12, -98.83)    1.09                42
 07/29/2025   07:11:14   (  69.98,  68.68) 07/29/2025   07:10:40  (  70.01,  68.66)    3.21                34
 07/31/2025   21:46:55   (  70.78,-151.45) 07/31/2025   21:48:03  (  70.71,-149.70)   64.97                68
 07/31/2025   22:37:26   ( -70.08,  16.97) 07/31/2025   22:37:43  ( -70.06,  16.98)    2.34                17
 07/31/2025   23:28:09   (  69.95,-175.51) 07/31/2025   23:27:10  (  69.95,-175.53)    1.03                59
 08/03/2025   14:03:37   (  70.12, -34.64) 08/03/2025   14:04:41  (  70.15, -34.65)    2.46                64
 08/03/2025   14:54:20   ( -70.05, 132.79) 08/03/2025   14:54:11  ( -70.05, 132.85)    2.03                 9
 08/03/2025   15:44:55   (  69.49, -59.07) 08/03/2025   15:43:45  (  69.54, -60.20)   44.46                70