Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 10 27.  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)
 10/29/2025   06:45:01   (  70.59,  74.33) 10/29/2025   06:46:11  (  70.44,  75.46)   44.77                70
 10/29/2025   07:35:34   ( -70.06,-117.51) 10/29/2025   07:35:46  ( -70.05,-117.47)    1.63                12
 10/29/2025   08:26:18   (  69.91,  50.01) 10/29/2025   08:25:14  (  69.89,  49.95)    3.16                64
 10/31/2025   23:01:42   (  70.10,-169.10) 10/31/2025   23:02:43  (  70.10,-169.14)    1.58                61
 10/31/2025   23:52:23   ( -69.98,  -1.60) 10/31/2025   23:52:13  ( -69.99,  -1.66)    2.53                10
 11/01/2025   00:42:58   (  69.37, 166.61) 11/01/2025   00:41:48  (  69.44, 165.23)   54.62                70
 11/03/2025   15:18:32   (  70.09, -53.30) 11/03/2025   15:19:09  (  70.06, -53.30)    3.47                37
 11/03/2025   16:09:13   ( -69.97, 114.21) 11/03/2025   16:08:39  ( -69.95, 114.18)    2.29                34
 11/06/2025   06:44:48   ( -70.79,-105.92) 11/06/2025   06:45:56  ( -70.70,-104.11)   67.33                68
 11/06/2025   07:35:20   (  70.04,  62.58) 11/06/2025   07:35:33  (  70.04,  62.57)    0.27                13
 11/06/2025   08:26:01   ( -69.91,-129.91) 11/06/2025   08:25:03  ( -69.93,-129.95)    2.72                58
 11/08/2025   23:01:25   ( -70.12,  10.95) 11/08/2025   23:02:31  ( -70.11,  10.92)    1.50                66
 11/08/2025   23:52:09   (  70.00, 178.43) 11/08/2025   23:51:58  (  69.99, 178.40)    1.84                11
 11/09/2025   00:42:44   ( -69.55, -13.58) 11/09/2025   00:41:33  ( -69.61, -14.49)   36.11                71