Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 9 4.  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)
 09/05/2025   22:12:03   (  70.29,-156.99) 09/05/2025   22:13:14  (  70.23,-156.63)   15.69                71
 09/05/2025   23:02:42   ( -70.03,  10.73) 09/05/2025   23:02:45  ( -70.06,  10.77)    2.83                 3
 09/05/2025   23:53:26   (  69.93, 178.19) 09/05/2025   23:52:13  (  69.90, 178.19)    3.30                73
 09/08/2025   14:28:53   (  70.09, -40.89) 09/08/2025   14:29:46  (  70.10, -40.92)    1.93                53
 09/08/2025   15:19:35   ( -69.99, 126.58) 09/08/2025   15:19:16  ( -69.99, 126.55)    1.00                19
 09/08/2025   16:10:03   (  69.08, -64.81) 09/08/2025   16:08:56  (  69.11, -66.99)   86.59                67
 09/11/2025   06:45:45   (  70.05,  74.94) 09/11/2025   06:46:15  (  70.05,  74.88)    2.24                30
 09/11/2025   07:36:27   ( -69.95,-117.59) 09/11/2025   07:35:45  ( -69.94,-117.64)    2.01                42
 09/13/2025   22:12:01   ( -70.49,  22.72) 09/13/2025   22:13:12  ( -70.40,  23.63)   35.23                71
 09/13/2025   23:02:38   (  70.02,-169.23) 09/13/2025   23:02:44  (  70.01,-169.28)    1.85                 6
 09/13/2025   23:53:20   ( -69.92,  -1.77) 09/13/2025   23:52:14  ( -69.91,  -1.80)    1.73                66
 09/16/2025   14:28:47   ( -70.10, 139.11) 09/16/2025   14:29:45  ( -70.11, 139.10)    0.80                58
 09/16/2025   15:19:31   (  69.99, -53.42) 09/16/2025   15:19:12  (  69.99, -53.42)    0.17                19