Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 11 5.  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)
 11/07/2025   14:53:18   ( -70.61, 132.23) 11/07/2025   14:54:28  ( -70.48, 133.41)   46.07                70
 11/07/2025   15:43:54   (  70.05, -59.58) 11/07/2025   15:44:01  (  70.05, -59.57)    0.37                 7
 11/07/2025   16:34:35   ( -69.93, 107.93) 11/07/2025   16:33:31  ( -69.94, 107.91)    1.66                64
 11/10/2025   07:10:10   ( -70.10,-111.21) 11/10/2025   07:11:03  ( -70.11,-111.25)    1.92                53
 11/10/2025   08:00:55   (  70.01,  56.22) 11/10/2025   08:00:30  (  70.00,  56.25)    1.31                25
 11/10/2025   08:51:21   ( -69.09,-135.12) 11/10/2025   08:50:14  ( -69.12,-137.31)   87.04                67
 11/12/2025   22:36:43   (  70.88,-164.04) 11/12/2025   22:37:50  (  70.80,-161.97)   76.07                67
 11/12/2025   23:27:11   ( -70.06,   4.59) 11/12/2025   23:27:32  ( -70.04,   4.54)    3.10                21
 11/13/2025   00:17:55   (  69.93, 172.09) 11/13/2025   00:16:59  (  69.93, 172.03)    2.55                56
 11/15/2025   14:53:29   (  70.13, -47.08) 11/15/2025   14:54:29  (  70.10, -47.12)    3.31                60
 11/15/2025   15:44:11   ( -70.04, 120.38) 11/15/2025   15:43:58  ( -70.05, 120.44)    3.02                13
 11/15/2025   16:34:44   (  69.33, -71.27) 11/15/2025   16:33:35  (  69.38, -72.83)   61.26                69
 11/18/2025   07:10:29   (  70.06,  68.77) 11/18/2025   07:10:56  (  70.08,  68.74)    2.44                27
 11/18/2025   08:01:11   ( -69.96,-123.77) 11/18/2025   08:00:26  ( -69.98,-123.77)    1.72                45