Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2024 12 12.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-9) LANDSAT-9 Lat/Lon    Distance(km)  Time Diff(sec)
 12/13/2024   05:56:08   ( -70.20, -92.63) 12/13/2024   05:56:42  ( -70.19, -92.56)    2.55                34
 12/13/2024   06:46:51   (  70.06,  74.90) 12/13/2024   06:46:10  (  70.04,  74.86)    2.79                41
 12/15/2024   21:22:27   (  70.79,-145.09) 12/15/2024   21:23:36  (  70.67,-143.63)   55.49                69
 12/15/2024   22:12:59   ( -70.14,  23.24) 12/15/2024   22:13:14  ( -70.12,  23.20)    3.03                15
 12/15/2024   23:03:42   (  70.00,-169.24) 12/15/2024   23:02:41  (  70.02,-169.30)    2.64                61
 12/18/2024   13:39:08   (  70.22, -28.41) 12/18/2024   13:40:14  (  70.22, -28.41)    0.17                66
 12/18/2024   14:29:50   ( -70.10, 139.09) 12/18/2024   14:29:44  ( -70.11, 139.07)    1.32                 6
 12/18/2024   15:20:27   (  69.64, -52.92) 12/18/2024   15:19:16  (  69.73, -53.83)   36.02                71
 12/21/2024   05:55:59   (  70.19,  87.42) 12/21/2024   05:56:44  (  70.16,  87.39)    3.29                45
 12/21/2024   06:46:41   ( -70.07,-105.09) 12/21/2024   06:46:14  ( -70.05,-105.13)    2.29                27
 12/23/2024   22:12:49   (  70.17,-156.77) 12/23/2024   22:13:11  (  70.17,-156.72)    2.08                22
 12/23/2024   23:03:31   ( -70.05,  10.72) 12/23/2024   23:02:41  ( -70.06,  10.77)    2.23                50