Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2024 12 25.  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)
 12/26/2024   13:39:01   ( -70.53, 151.12) 12/26/2024   13:40:12  ( -70.44, 151.90)   30.70                71
 12/26/2024   14:29:39   (  70.13, -40.93) 12/26/2024   14:29:43  (  70.12, -40.92)    0.43                 4
 12/26/2024   15:20:21   ( -70.02, 126.55) 12/26/2024   15:19:13  ( -70.01, 126.56)    1.19                68
 12/29/2024   05:55:46   ( -70.23, -92.62) 12/29/2024   05:56:44  ( -70.22, -92.54)    3.47                58
 12/29/2024   06:46:29   (  70.09,  74.91) 12/29/2024   06:46:11  (  70.11,  74.95)    3.14                18
 12/29/2024   07:37:00   ( -69.40,-116.75) 12/29/2024   07:35:51  ( -69.45,-118.32)   61.60                69
 12/31/2024   22:12:35   ( -70.16,  23.28) 12/31/2024   22:13:12  ( -70.16,  23.27)    0.64                37
 12/31/2024   23:03:19   (  70.07,-169.27) 12/31/2024   23:02:39  (  70.05,-169.25)    1.93                40
 01/03/2025   13:38:51   (  70.73, -29.15) 01/03/2025   13:40:00  (  70.65, -27.76)   52.11                69
 01/03/2025   14:29:24   ( -70.15, 139.08) 01/03/2025   14:29:37  ( -70.16, 139.15)    2.79                13
 01/03/2025   15:20:07   (  70.01, -53.39) 01/03/2025   15:19:05  (  69.99, -53.44)    2.89                62
 01/06/2025   05:55:31   (  70.21,  87.46) 01/06/2025   05:56:33  (  70.20,  87.49)    1.27                62
 01/06/2025   06:46:13   ( -70.11,-105.06) 01/06/2025   06:46:03  ( -70.10,-105.03)    1.44                10
 01/06/2025   07:36:48   (  69.53,  63.10) 01/06/2025   07:35:37  (  69.59,  61.91)   46.37                71