Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 4 18.  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)
 04/18/2025   22:36:26   (  70.18,-162.89) 04/18/2025   22:37:15  (  70.18,-162.97)    2.77                49
 04/18/2025   23:27:09   ( -70.12,   4.52) 04/18/2025   23:26:44  ( -70.12,   4.58)    2.18                25
 04/21/2025   14:53:16   (  70.17, -47.09) 04/21/2025   14:53:41  (  70.17, -47.10)    0.64                25
 04/21/2025   15:43:58   ( -70.05, 120.41) 04/21/2025   15:43:11  ( -70.05, 120.37)    1.54                47
 04/24/2025   06:19:26   ( -70.46, -99.06) 04/24/2025   06:20:37  ( -70.39, -98.53)   21.12                71
 04/24/2025   07:10:05   (  70.12,  68.79) 04/24/2025   07:10:07  (  70.12,  68.72)    2.48                 2
 04/24/2025   08:00:48   ( -70.05,-123.80) 04/24/2025   07:59:36  ( -70.06,-123.73)    2.62                72
 04/26/2025   22:36:11   ( -70.21,  17.13) 04/26/2025   22:37:05  ( -70.19,  17.08)    2.64                54
 04/26/2025   23:26:54   (  70.08,-175.36) 04/26/2025   23:26:32  (  70.08,-175.43)    2.80                22
 04/27/2025   00:17:22   ( -69.22,  -6.78) 04/27/2025   00:16:15  ( -69.26,  -8.93)   84.58                67
 04/29/2025   14:52:59   ( -70.18, 132.96) 04/29/2025   14:53:28  ( -70.18, 132.95)    0.53                29
 04/29/2025   15:43:42   (  70.05, -59.53) 04/29/2025   15:42:55  (  70.07, -59.56)    2.02                47