Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2024 12 30.  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)
 12/30/2024   14:04:10   ( -70.19, 145.34) 12/30/2024   14:04:52  ( -70.20, 145.36)    0.95                42
 12/30/2024   14:54:54   (  70.09, -47.20) 12/30/2024   14:54:19  (  70.10, -47.14)    2.35                35
 01/02/2025   05:30:33   (  71.07,  92.38) 01/02/2025   05:31:40  (  70.98,  94.77)   86.87                67
 01/02/2025   06:20:59   ( -70.13, -98.78) 01/02/2025   06:21:23  ( -70.16, -98.83)    3.05                24
 01/02/2025   07:11:43   (  70.03,  68.68) 01/02/2025   07:10:50  (  70.05,  68.67)    2.10                53
 01/04/2025   21:47:10   (  70.40,-150.73) 01/04/2025   21:48:21  (  70.33,-150.33)   17.11                71
 01/04/2025   22:37:48   ( -70.09,  17.07) 01/04/2025   22:37:53  ( -70.11,  16.99)    3.60                 5
 01/04/2025   23:28:32   (  69.99,-175.48) 01/04/2025   23:27:20  (  70.01,-175.52)    2.04                72
 01/07/2025   14:03:55   (  70.22, -34.66) 01/07/2025   14:04:50  (  70.23, -34.59)    2.70                55
 01/07/2025   14:54:36   ( -70.07, 132.89) 01/07/2025   14:54:21  ( -70.07, 132.81)    2.98                15
 01/07/2025   15:45:07   (  69.28, -58.65) 01/07/2025   15:43:59  (  69.35, -60.53)   74.41                68
 01/10/2025   06:20:43   (  70.17,  81.22) 01/10/2025   06:21:18  (  70.18,  81.23)    1.69                35
 01/10/2025   07:11:25   ( -70.07,-111.32) 01/10/2025   07:10:48  ( -70.08,-111.29)    1.34                37
 01/12/2025   21:47:00   ( -70.91,  28.51) 01/12/2025   21:48:08  ( -70.80,  30.38)   69.35                68
 01/12/2025   22:37:31   (  70.13,-162.93) 01/12/2025   22:37:45  (  70.13,-162.95)    0.89                14
 01/12/2025   23:28:13   ( -70.03,   4.53) 01/12/2025   23:27:15  ( -70.03,   4.53)    0.28                58