Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 7 17.  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   (  70.15, -34.66) 07/18/2025   14:04:39  (  70.17, -34.63)    2.73                64
 07/18/2025   14:54:17   ( -70.06, 132.80) 07/18/2025   14:54:09  ( -70.06, 132.85)    1.87                 8
 07/18/2025   15:44:53   (  69.52, -59.09) 07/18/2025   15:43:43  (  69.57, -60.19)   43.02                70
 07/21/2025   06:20:30   (  70.10,  81.18) 07/21/2025   06:21:10  (  70.12,  81.18)    2.33                40
 07/21/2025   07:11:12   ( -70.00,-111.35) 07/21/2025   07:10:40  ( -70.02,-111.33)    1.82                32
 07/23/2025   21:46:55   ( -70.89,  28.38) 07/23/2025   21:48:03  ( -70.77,  30.38)   74.44                68
 07/23/2025   22:37:25   (  70.06,-162.99) 07/23/2025   22:37:41  (  70.06,-163.02)    1.19                16
 07/23/2025   23:28:07   ( -69.95,   4.49) 07/23/2025   23:27:11  ( -69.96,   4.47)    1.15                56
 07/26/2025   14:03:36   ( -70.17, 145.30) 07/26/2025   14:04:43  ( -70.16, 145.35)    2.08                67
 07/26/2025   14:54:19   (  70.02, -47.16) 07/26/2025   14:54:10  (  70.04, -47.17)    2.17                 9
 07/26/2025   15:44:56   ( -69.65, 120.72) 07/26/2025   15:43:44  ( -69.72, 120.02)   28.29                72
 07/29/2025   06:20:31   ( -70.13, -98.87) 07/29/2025   06:21:13  ( -70.13, -98.81)    2.05                42
 07/29/2025   07:11:14   (  69.99,  68.65) 07/29/2025   07:10:40  (  70.01,  68.67)    2.25                34