Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 4 9.  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)
 04/10/2025   22:36:40   ( -70.20,  17.03) 04/10/2025   22:37:21  ( -70.21,  17.07)    1.65                41
 04/10/2025   23:27:23   (  70.07,-175.45) 04/10/2025   23:26:49  (  70.05,-175.51)    2.94                34
 04/13/2025   14:02:59   (  70.90, -35.62) 04/13/2025   14:04:07  (  70.79, -33.82)   67.10                68
 04/13/2025   14:53:29   ( -70.15, 132.90) 04/13/2025   14:53:46  ( -70.18, 132.92)    3.12                17
 04/13/2025   15:44:12   (  70.02, -59.59) 04/13/2025   15:43:14  (  70.02, -59.67)    2.89                58
 04/16/2025   06:19:37   (  70.23,  81.24) 04/16/2025   06:20:42  (  70.21,  81.23)    2.36                65
 04/16/2025   07:10:19   ( -70.11,-111.25) 04/16/2025   07:10:12  ( -70.10,-111.30)    2.07                 7
 04/16/2025   08:00:55   (  69.61,  56.80) 04/16/2025   07:59:44  (  69.72,  55.81)   40.26                71
 04/18/2025   22:36:27   (  70.21,-162.93) 04/18/2025   22:37:06  (  70.20,-162.90)    1.87                39
 04/18/2025   23:27:09   ( -70.08,   4.58) 04/18/2025   23:26:36  ( -70.09,   4.57)    0.28                33
 04/21/2025   14:02:45   ( -70.90, 144.44) 04/21/2025   14:03:53  ( -70.79, 146.23)   66.33                68
 04/21/2025   14:53:16   (  70.14, -47.04) 04/21/2025   14:53:30  (  70.13, -47.09)    2.40                14
 04/21/2025   15:43:59   ( -70.07, 120.39) 04/21/2025   15:42:59  ( -70.08, 120.46)    2.97                60