Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 7 16.  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)
 07/18/2025   14:03:35   (  70.16, -34.68) 07/18/2025   14:04:39  (  70.16, -34.65)    1.45                64
 07/18/2025   14:54:17   ( -70.07, 132.78) 07/18/2025   14:54:09  ( -70.05, 132.83)    2.89                 8
 07/18/2025   15:44:53   (  69.53, -59.11) 07/18/2025   15:43:42  (  69.61, -60.13)   40.54                71
 07/21/2025   06:20:30   (  70.12,  81.16) 07/21/2025   06:21:10  (  70.11,  81.17)    0.54                40
 07/21/2025   07:11:12   ( -70.01,-111.37) 07/21/2025   07:10:40  ( -70.01,-111.35)    1.07                32
 07/23/2025   21:46:55   ( -70.90,  28.36) 07/23/2025   21:48:03  ( -70.77,  30.37)   74.97                68
 07/23/2025   22:37:25   (  70.07,-163.01) 07/23/2025   22:37:41  (  70.06,-163.03)    2.09                16
 07/23/2025   23:28:07   ( -69.96,   4.48) 07/23/2025   23:27:11  ( -69.95,   4.46)    1.26                56
 07/26/2025   14:03:37   ( -70.17, 145.29) 07/26/2025   14:04:44  ( -70.16, 145.35)    2.89                67
 07/26/2025   14:54:20   (  70.03, -47.18) 07/26/2025   14:54:11  (  70.04, -47.17)    1.02                 9
 07/26/2025   15:44:57   ( -69.65, 120.71) 07/26/2025   15:43:45  ( -69.72, 120.02)   27.79                72
 07/29/2025   06:20:31   ( -70.13, -98.87) 07/29/2025   06:21:13  ( -70.13, -98.81)    2.33                42
 07/29/2025   07:11:14   (  69.99,  68.65) 07/29/2025   07:10:40  (  70.01,  68.67)    2.23                34