Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2024 12 30.  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   ( -70.14,  23.31) 12/31/2024   22:13:11  ( -70.16,  23.26)    2.37                37
 12/31/2024   23:03:18   (  70.04,-169.23) 12/31/2024   23:02:38  (  70.06,-169.24)    1.32                40
 01/03/2025   13:38:51   (  70.72, -29.14) 01/03/2025   13:40:00  (  70.62, -27.80)   50.57                69
 01/03/2025   14:29:23   ( -70.10, 139.17) 01/03/2025   14:29:37  ( -70.12, 139.10)    3.41                14
 01/03/2025   15:20:07   (  70.00, -53.37) 01/03/2025   15:19:04  (  70.01, -53.41)    1.92                63
 01/06/2025   05:55:30   (  70.17,  87.53) 01/06/2025   05:56:32  (  70.18,  87.45)    3.07                62
 01/06/2025   06:46:12   ( -70.07,-105.00) 01/06/2025   06:46:02  ( -70.07,-105.07)    2.65                10
 01/06/2025   07:36:47   (  69.49,  63.16) 01/06/2025   07:35:37  (  69.51,  61.81)   52.75                70
 01/08/2025   22:12:18   (  70.16,-156.67) 01/08/2025   22:12:54  (  70.16,-156.66)    0.61                36
 01/08/2025   23:03:00   ( -70.06,  10.80) 01/08/2025   23:02:24  ( -70.05,  10.82)    1.03                36
 01/11/2025   13:38:32   ( -70.74, 150.90) 01/11/2025   13:39:42  ( -70.64, 152.30)   53.02                70
 01/11/2025   14:29:06   (  70.12, -40.81) 01/11/2025   14:29:16  (  70.14, -40.78)    2.63                10
 01/11/2025   15:19:48   ( -70.02, 126.66) 01/11/2025   15:18:46  ( -70.03, 126.70)    1.92                62