Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 7 13.  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)
 07/13/2025   06:20:27   ( -70.12, -98.83) 07/13/2025   06:21:08  ( -70.11, -98.84)    1.03                41
 07/13/2025   07:11:11   (  69.99,  68.67) 07/13/2025   07:10:35  (  70.01,  68.66)    1.57                36
 07/15/2025   21:46:51   (  70.78,-151.43) 07/15/2025   21:47:59  (  70.70,-149.73)   62.96                68
 07/15/2025   22:37:22   ( -70.11,  16.95) 07/15/2025   22:37:38  ( -70.09,  17.02)    2.87                16
 07/15/2025   23:28:06   (  69.99,-175.56) 07/15/2025   23:27:05  (  69.99,-175.49)    2.89                61
 07/18/2025   14:03:35   (  70.15, -34.66) 07/18/2025   14:04:39  (  70.17, -34.63)    2.89                64
 07/18/2025   14:54:17   ( -70.05, 132.81) 07/18/2025   14:54:09  ( -70.07, 132.86)    2.70                 8
 07/18/2025   15:44:53   (  69.52, -59.09) 07/18/2025   15:43:43  (  69.57, -60.18)   42.94                70
 07/21/2025   06:20:30   (  70.10,  81.18) 07/21/2025   06:21:10  (  70.13,  81.19)    3.01                40
 07/21/2025   07:11:12   ( -70.00,-111.34) 07/21/2025   07:10:41  ( -69.97,-111.40)    3.37                31
 07/23/2025   21:46:55   ( -70.88,  28.39) 07/23/2025   21:48:03  ( -70.79,  30.40)   74.24                68
 07/23/2025   22:37:25   (  70.06,-162.98) 07/23/2025   22:37:41  (  70.07,-163.01)    1.82                16
 07/23/2025   23:28:07   ( -69.94,   4.50) 07/23/2025   23:27:11  ( -69.97,   4.48)    3.20                56
 07/26/2025   14:03:36   ( -70.16, 145.32) 07/26/2025   14:04:43  ( -70.17, 145.37)    2.72                67
 07/26/2025   14:54:19   (  70.02, -47.15) 07/26/2025   14:54:11  (  70.00, -47.23)    3.27                 8
 07/26/2025   15:44:57   ( -69.69, 120.65) 07/26/2025   15:43:44  ( -69.74, 120.04)   24.41                73