Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 10 16.  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)
 10/18/2025   15:18:58   (  70.03, -53.33) 10/18/2025   15:19:23  (  70.04, -53.40)    2.42                25
 10/18/2025   16:09:39   ( -69.93, 114.15) 10/18/2025   16:08:53  ( -69.93, 114.08)    2.44                46
 10/21/2025   06:45:10   ( -70.43,-105.47) 10/21/2025   06:46:21  ( -70.33,-104.74)   29.83                71
 10/21/2025   07:35:49   (  70.03,  62.46) 10/21/2025   07:35:51  (  70.05,  62.51)    3.07                 2
 10/21/2025   08:26:30   ( -69.92,-130.05) 10/21/2025   08:25:21  ( -69.95,-130.01)    3.31                69
 10/23/2025   23:01:55   ( -70.12,  10.81) 10/23/2025   23:02:53  ( -70.09,  10.80)    3.47                58
 10/23/2025   23:52:39   (  69.98, 178.33) 10/23/2025   23:52:20  (  69.97, 178.29)    1.61                19
 10/24/2025   00:43:09   ( -69.29, -13.34) 10/24/2025   00:42:00  ( -69.32, -14.97)   64.38                69
 10/26/2025   15:18:44   ( -70.08, 126.66) 10/26/2025   15:19:19  ( -70.09, 126.69)    1.80                35
 10/26/2025   16:09:28   (  69.94, -65.83) 10/26/2025   16:08:46  (  69.97, -65.83)    3.32                42
 10/29/2025   06:45:01   (  70.59,  74.33) 10/29/2025   06:46:11  (  70.43,  75.45)   44.88                70
 10/29/2025   07:35:34   ( -70.04,-117.49) 10/29/2025   07:35:46  ( -70.05,-117.46)    1.73                12
 10/29/2025   08:26:18   (  69.91,  50.01) 10/29/2025   08:25:13  (  69.94,  50.02)    2.37                65