Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 10 9.  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)
 10/10/2025   14:28:37   (  70.66, -41.68) 10/10/2025   14:29:46  (  70.57, -40.25)   53.73                69
 10/10/2025   15:19:08   ( -70.03, 126.63) 10/10/2025   15:19:24  ( -70.02, 126.58)    1.94                16
 10/10/2025   16:09:53   (  69.93, -65.92) 10/10/2025   16:08:51  (  69.92, -65.92)    1.29                62
 10/13/2025   06:45:17   (  70.10,  74.99) 10/13/2025   06:46:24  (  70.09,  74.92)    2.58                67
 10/13/2025   07:35:58   ( -69.99,-117.52) 10/13/2025   07:35:54  ( -69.99,-117.59)    2.67                 4
 10/13/2025   08:26:37   (  69.58,  50.39) 10/13/2025   08:25:25  (  69.66,  49.60)   32.01                72
 10/15/2025   23:02:08   (  70.07,-169.18) 10/15/2025   23:02:54  (  70.08,-169.22)    1.46                46
 10/15/2025   23:52:49   ( -69.96,  -1.69) 10/15/2025   23:52:24  ( -69.98,  -1.73)    2.08                25
 10/18/2025   15:18:59   (  70.05, -53.37) 10/18/2025   15:19:24  (  70.04, -53.40)    2.48                25
 10/18/2025   16:09:40   ( -69.94, 114.13) 10/18/2025   16:08:54  ( -69.93, 114.09)    1.44                46
 10/21/2025   06:45:11   ( -70.44,-105.49) 10/21/2025   06:46:22  ( -70.36,-104.70)   30.79                71
 10/21/2025   07:35:50   (  70.04,  62.44) 10/21/2025   07:35:53  (  70.02,  62.46)    2.88                 3
 10/21/2025   08:26:30   ( -69.93,-130.06) 10/21/2025   08:25:22  ( -69.92,-130.04)    0.92                68