Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 10 11.  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)
 10/13/2025   06:45:17   (  70.09,  75.01) 10/13/2025   06:46:24  (  70.11,  74.94)    3.48                67
 10/13/2025   07:35:58   ( -69.98,-117.51) 10/13/2025   07:35:54  ( -70.00,-117.58)    3.33                 4
 10/13/2025   08:26:37   (  69.57,  50.41) 10/13/2025   08:25:26  (  69.62,  49.54)   34.35                71
 10/15/2025   23:02:09   (  70.11,-169.25) 10/15/2025   23:02:54  (  70.09,-169.20)    3.14                45
 10/15/2025   23:52:50   ( -70.01,  -1.76) 10/15/2025   23:52:24  ( -69.98,  -1.72)    2.93                26
 10/18/2025   15:18:59   (  70.05, -53.35) 10/18/2025   15:19:24  (  70.05, -53.39)    1.22                25
 10/18/2025   16:09:39   ( -69.94, 114.14) 10/18/2025   16:08:53  ( -69.94, 114.10)    1.50                46
 10/21/2025   06:45:10   ( -70.44,-105.48) 10/21/2025   06:46:21  ( -70.36,-104.69)   30.74                71
 10/21/2025   07:35:49   (  70.04,  62.45) 10/21/2025   07:35:52  (  70.03,  62.47)    1.61                 3
 10/21/2025   08:26:30   ( -69.93,-130.06) 10/21/2025   08:25:22  ( -69.93,-130.04)    0.97                68
 10/23/2025   23:01:55   ( -70.12,  10.80) 10/23/2025   23:02:54  ( -70.10,  10.82)    2.49                59
 10/23/2025   23:52:39   (  69.99, 178.31) 10/23/2025   23:52:21  (  69.98, 178.29)    0.97                18