Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2024 12 31.  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)
 12/31/2024   22:12:34   ( -70.16,  23.29) 12/31/2024   22:13:11  ( -70.15,  23.25)    1.82                37
 12/31/2024   23:03:18   (  70.06,-169.25) 12/31/2024   23:02:38  (  70.04,-169.26)    1.31                40
 01/03/2025   13:38:50   (  70.68, -29.08) 01/03/2025   13:40:00  (  70.59, -27.84)   46.84                70
 01/03/2025   14:29:23   ( -70.11, 139.14) 01/03/2025   14:29:37  ( -70.09, 139.07)    3.65                14
 01/03/2025   15:20:07   (  70.01, -53.40) 01/03/2025   15:19:03  (  70.04, -53.36)    3.23                64
 01/06/2025   05:55:30   (  70.19,  87.49) 01/06/2025   05:56:31  (  70.18,  87.46)    1.37                61
 01/06/2025   06:46:12   ( -70.09,-105.04) 01/06/2025   06:46:01  ( -70.07,-105.06)    2.61                11
 01/06/2025   07:36:46   (  69.46,  63.20) 01/06/2025   07:35:36  (  69.52,  61.82)   54.37                70
 01/08/2025   22:12:18   (  70.14,-156.63) 01/08/2025   22:12:54  (  70.14,-156.69)    2.12                36
 01/08/2025   23:03:00   ( -70.04,  10.83) 01/08/2025   23:02:24  ( -70.03,  10.79)    2.32                36
 01/11/2025   13:38:31   ( -70.73, 150.91) 01/11/2025   13:39:40  ( -70.63, 152.30)   52.47                69
 01/11/2025   14:29:05   (  70.11, -40.80) 01/11/2025   14:29:14  (  70.13, -40.79)    1.93                 9
 01/11/2025   15:19:47   ( -70.01, 126.67) 01/11/2025   15:18:44  ( -70.02, 126.69)    0.89                63
 01/14/2025   05:55:09   ( -70.20, -92.45) 01/14/2025   05:56:07  ( -70.22, -92.39)    2.74                58
 01/14/2025   06:45:53   (  70.10,  75.01) 01/14/2025   06:45:34  (  70.09,  75.08)    2.86                19