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,  23.27)    2.60                37
 12/31/2024   23:03:18   (  70.04,-169.23) 12/31/2024   23:02:38  (  70.06,-169.23)    1.52                40
 01/03/2025   13:38:51   (  70.72, -29.14) 01/03/2025   13:40:00  (  70.63, -27.79)   50.77                69
 01/03/2025   14:29:24   ( -70.15, 139.09) 01/03/2025   14:29:37  ( -70.13, 139.12)    2.20                13
 01/03/2025   15:20:07   (  70.00, -53.37) 01/03/2025   15:19:04  (  70.02, -53.39)    2.94                63
 01/06/2025   05:55:31   (  70.22,  87.45) 01/06/2025   05:56:32  (  70.20,  87.48)    2.18                61
 01/06/2025   06:46:12   ( -70.06,-105.00) 01/06/2025   06:46:02  ( -70.09,-105.04)    3.23                10
 01/06/2025   07:36:47   (  69.49,  63.17) 01/06/2025   07:35:37  (  69.54,  61.84)   51.97                70
 01/08/2025   22:12:18   (  70.15,-156.65) 01/08/2025   22:12:55  (  70.15,-156.68)    1.14                37
 01/08/2025   23:03:00   ( -70.05,  10.81) 01/08/2025   23:02:25  ( -70.04,  10.80)    1.55                35
 01/11/2025   13:38:33   ( -70.78, 150.83) 01/11/2025   13:39:42  ( -70.70, 152.39)   58.00                69
 01/11/2025   14:29:06   (  70.10, -40.79) 01/11/2025   14:29:18  (  70.09, -40.86)    3.14                12
 01/11/2025   15:19:48   ( -70.01, 126.67) 01/11/2025   15:18:48  ( -69.98, 126.62)    3.40                60