Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 7 10.  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)
 07/10/2025   14:03:31   ( -70.15, 145.35) 07/10/2025   14:04:36  ( -70.14, 145.33)    2.05                65
 07/10/2025   14:54:15   (  70.03, -47.15) 07/10/2025   14:54:03  (  70.04, -47.17)    1.36                12
 07/10/2025   15:44:50   ( -69.58, 120.84) 07/10/2025   15:43:38  ( -69.65, 119.92)   36.27                72
 07/13/2025   06:20:27   ( -70.14, -98.87) 07/13/2025   06:21:07  ( -70.14, -98.80)    2.61                40
 07/13/2025   07:11:11   (  70.02,  68.63) 07/13/2025   07:10:34  (  70.03,  68.70)    2.95                37
 07/15/2025   21:46:51   (  70.75,-151.39) 07/15/2025   21:48:00  (  70.67,-149.78)   60.02                69
 07/15/2025   22:37:22   ( -70.08,  17.00) 07/15/2025   22:37:39  ( -70.07,  16.98)    1.20                17
 07/15/2025   23:28:06   (  69.97,-175.52) 07/15/2025   23:27:06  (  69.96,-175.53)    0.74                60
 07/18/2025   14:03:35   (  70.12, -34.62) 07/18/2025   14:04:40  (  70.14, -34.67)    3.15                65
 07/18/2025   14:54:17   ( -70.02, 132.85) 07/18/2025   14:54:10  ( -70.04, 132.82)    2.94                 7
 07/18/2025   15:44:54   (  69.54, -59.13) 07/18/2025   15:43:43  (  69.60, -60.15)   40.11                71
 07/21/2025   06:20:30   (  70.12,  81.15) 07/21/2025   06:21:10  (  70.10,  81.15)    2.50                40
 07/21/2025   07:11:12   ( -70.01,-111.37) 07/21/2025   07:10:40  ( -70.00,-111.36)    1.39                32
 07/23/2025   21:46:55   ( -70.90,  28.36) 07/23/2025   21:48:03  ( -70.76,  30.36)   74.58                68
 07/23/2025   22:37:25   (  70.07,-163.01) 07/23/2025   22:37:40  (  70.10,-162.97)    3.20                15
 07/23/2025   23:28:07   ( -69.96,   4.48) 07/23/2025   23:27:11  ( -69.95,   4.45)    1.60                56