Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 11 13.  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)
 11/14/2025   06:45:07   (  70.59,  74.32) 11/14/2025   06:46:17  (  70.49,  75.50)   45.04                70
 11/14/2025   07:35:40   ( -70.03,-117.49) 11/14/2025   07:35:53  ( -70.05,-117.51)    1.55                13
 11/14/2025   08:26:25   (  69.95,  49.94) 11/14/2025   08:25:20  (  69.94,  49.99)    2.26                65
 11/16/2025   23:01:59   (  70.12,-169.19) 11/16/2025   23:02:51  (  70.13,-169.14)    2.29                52
 11/16/2025   23:52:40   ( -69.98,  -1.66) 11/16/2025   23:52:22  ( -69.96,  -1.74)    3.36                18
 11/17/2025   00:43:09   (  69.05, 166.99) 11/17/2025   00:42:02  (  69.14, 164.79)   87.71                67
 11/19/2025   14:28:31   ( -71.04, 137.76) 11/19/2025   14:29:37  ( -70.97, 140.37)   94.74                66
 11/19/2025   15:18:58   (  70.03, -53.31) 11/19/2025   15:19:19  (  70.04, -53.37)    2.37                21
 11/19/2025   16:09:40   ( -69.94, 114.15) 11/19/2025   16:08:49  ( -69.94, 114.11)    1.38                51
 11/22/2025   06:45:14   ( -70.13,-105.01) 11/22/2025   06:46:18  ( -70.13,-105.00)    0.68                64
 11/22/2025   07:35:58   (  70.02,  62.46) 11/22/2025   07:35:45  (  70.01,  62.49)    0.98                13
 11/22/2025   08:26:32   ( -69.50,-129.44) 11/22/2025   08:25:21  ( -69.58,-130.48)   41.51                71
 11/24/2025   23:02:12   ( -70.07,  10.83) 11/24/2025   23:02:43  ( -70.05,  10.79)    3.17                31
 11/24/2025   23:52:56   (  69.97, 178.30) 11/24/2025   23:52:09  (  69.98, 178.34)    2.58                47