Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2024 12 26.  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, 151.13) 12/26/2024   13:40:12  ( -70.45, 151.91)   30.29                71
 12/26/2024   14:29:39   (  70.12, -40.92) 12/26/2024   14:29:43  (  70.13, -40.91)    1.28                 4
 12/26/2024   15:20:21   ( -70.01, 126.56) 12/26/2024   15:19:13  ( -70.02, 126.56)    0.25                68
 12/29/2024   05:55:45   ( -70.18, -92.54) 12/29/2024   05:56:45  ( -70.17, -92.61)    3.00                60
 12/29/2024   06:46:29   (  70.09,  74.92) 12/29/2024   06:46:12  (  70.06,  74.88)    2.67                17
 12/29/2024   07:37:00   ( -69.40,-116.75) 12/29/2024   07:35:51  ( -69.46,-118.32)   61.51                69
 12/31/2024   22:12:35   ( -70.16,  23.28) 12/31/2024   22:13:12  ( -70.16,  23.27)    0.27                37
 12/31/2024   23:03:19   (  70.07,-169.27) 12/31/2024   23:02:39  (  70.05,-169.24)    1.97                40
 01/03/2025   13:38:51   (  70.74, -29.17) 01/03/2025   13:40:00  (  70.65, -27.75)   53.02                69
 01/03/2025   14:29:23   ( -70.11, 139.15) 01/03/2025   14:29:38  ( -70.10, 139.08)    2.62                15
 01/03/2025   15:20:07   (  70.02, -53.40) 01/03/2025   15:19:05  (  69.99, -53.44)    3.15                62
 01/06/2025   05:55:30   (  70.18,  87.51) 01/06/2025   05:56:33  (  70.20,  87.49)    3.01                63
 01/06/2025   06:46:12   ( -70.07,-105.01) 01/06/2025   06:46:03  ( -70.10,-105.03)    2.79                 9
 01/06/2025   07:36:47   (  69.50,  63.15) 01/06/2025   07:35:37  (  69.60,  61.92)   48.86                70
 01/08/2025   22:12:19   (  70.16,-156.67) 01/08/2025   22:12:58  (  70.14,-156.70)    2.13                39
 01/08/2025   23:03:01   ( -70.06,  10.81) 01/08/2025   23:02:28  ( -70.04,  10.79)    2.04                33