Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 11 13.  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)
 11/15/2025   14:53:29   (  70.14, -47.09) 11/15/2025   14:54:32  (  70.13, -47.10)    1.26                63
 11/15/2025   15:44:10   ( -70.00, 120.43) 11/15/2025   15:44:02  ( -70.02, 120.38)    2.60                 8
 11/15/2025   16:34:46   (  69.44, -71.44) 11/15/2025   16:33:36  (  69.52, -72.66)   48.20                70
 11/18/2025   07:10:29   (  70.10,  68.71) 11/18/2025   07:11:02  (  70.10,  68.74)    1.16                33
 11/18/2025   08:01:11   ( -70.01,-123.83) 11/18/2025   08:00:32  ( -70.00,-123.77)    2.89                39
 11/20/2025   22:36:50   ( -70.46,  16.59) 11/20/2025   22:38:01  ( -70.34,  17.33)   30.34                71
 11/20/2025   23:27:28   (  70.03,-175.43) 11/20/2025   23:27:32  (  70.01,-175.50)    3.53                 4
 11/21/2025   00:18:10   ( -69.93,  -7.96) 11/21/2025   00:17:01  ( -69.96,  -7.94)    3.38                69
 11/23/2025   14:53:43   ( -70.14, 132.85) 11/23/2025   14:54:31  ( -70.14, 132.92)    2.35                48
 11/23/2025   15:44:27   (  70.03, -59.67) 11/23/2025   15:43:58  (  70.02, -59.60)    2.76                29
 11/26/2025   06:20:11   (  70.78,  80.26) 11/26/2025   06:21:19  (  70.68,  81.97)   63.75                68
 11/26/2025   07:10:42   ( -70.09,-111.32) 11/26/2025   07:10:58  ( -70.08,-111.27)    2.41                16
 11/26/2025   08:01:25   (  69.94,  56.22) 11/26/2025   08:00:25  (  69.96,  56.21)    2.67                60