Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 4 29.  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)
 04/29/2025   14:02:53   (  71.06, -35.86) 04/29/2025   14:04:00  (  70.92, -33.64)   82.08                67
 04/29/2025   14:53:20   ( -70.16, 132.91) 04/29/2025   14:53:42  ( -70.14, 132.85)    3.06                22
 04/29/2025   15:44:04   (  70.06, -59.63) 04/29/2025   15:43:09  (  70.04, -59.65)    2.02                55
 05/02/2025   06:19:36   (  70.23,  81.24) 05/02/2025   06:20:42  (  70.21,  81.18)    3.45                66
 05/02/2025   07:10:18   ( -70.12,-111.27) 05/02/2025   07:10:11  ( -70.15,-111.27)    3.46                 7
 05/02/2025   08:00:55   (  69.64,  56.75) 05/02/2025   07:59:44  (  69.71,  55.76)   38.69                71
 05/04/2025   22:36:34   (  70.19,-162.95) 05/04/2025   22:37:11  (  70.17,-163.00)    2.94                37
 05/04/2025   23:27:15   ( -70.08,   4.54) 05/04/2025   23:26:40  ( -70.06,   4.48)    3.21                35
 05/07/2025   14:02:55   ( -70.69, 144.71) 05/07/2025   14:04:05  ( -70.59, 145.85)   43.33                70
 05/07/2025   14:53:31   (  70.17, -47.15) 05/07/2025   14:53:38  (  70.16, -47.14)    1.28                 7
 05/07/2025   15:44:13   ( -70.06, 120.33) 05/07/2025   15:43:08  ( -70.05, 120.34)    1.24                65
 05/10/2025   06:19:44   ( -70.20, -98.76) 05/10/2025   06:20:39  ( -70.22, -98.82)    2.58                55
 05/10/2025   07:10:28   (  70.10,  68.70) 05/10/2025   07:10:06  (  70.11,  68.67)    1.52                22
 05/10/2025   08:00:56   ( -69.25,-122.73) 05/10/2025   07:59:48  ( -69.34,-124.75)   79.71                68
 05/12/2025   21:46:16   (  71.15,-151.86) 05/12/2025   21:47:22  (  71.06,-149.30)   92.49                66
 05/12/2025   22:36:42   ( -70.20,  17.00) 05/12/2025   22:37:06  ( -70.19,  17.02)    1.90                24
 05/12/2025   23:27:26   (  70.10,-175.53) 05/12/2025   23:26:33  (  70.07,-175.49)    3.23                53