Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 11 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)
 11/11/2025   15:18:40   ( -70.06, 126.72) 11/11/2025   15:19:25  ( -70.07, 126.64)    3.24                45
 11/11/2025   16:09:25   (  69.97, -65.84) 11/11/2025   16:08:52  (  69.97, -65.86)    1.00                33
 11/14/2025   06:45:07   (  70.59,  74.31) 11/14/2025   06:46:17  (  70.51,  75.52)   45.94                70
 11/14/2025   07:35:40   ( -70.04,-117.50) 11/14/2025   07:35:54  ( -70.01,-117.56)    3.48                14
 11/14/2025   08:26:24   (  69.90,  50.01) 11/14/2025   08:25:21  (  69.91,  49.94)    2.79                63
 11/16/2025   23:01:59   (  70.12,-169.19) 11/16/2025   23:02:52  (  70.14,-169.13)    2.99                53
 11/16/2025   23:52:40   ( -69.98,  -1.66) 11/16/2025   23:52:23  ( -69.97,  -1.73)    2.76                17
 11/17/2025   00:43:10   (  69.11, 166.91) 11/17/2025   00:42:03  (  69.14, 164.79)   84.12                67
 11/19/2025   15:18:59   (  70.08, -53.37) 11/19/2025   15:19:21  (  70.06, -53.36)    2.01                22
 11/19/2025   16:09:41   ( -69.98, 114.09) 11/19/2025   16:08:51  ( -69.95, 114.13)    3.21                50
 11/22/2025   06:45:14   ( -70.10,-104.97) 11/22/2025   06:46:22  ( -70.11,-105.03)    2.64                68
 11/22/2025   07:35:58   (  69.99,  62.50) 11/22/2025   07:35:49  (  70.00,  62.45)    2.19                 9
 11/22/2025   08:26:35   ( -69.63,-129.63) 11/22/2025   08:25:23  ( -69.68,-130.37)   28.92                72
 11/24/2025   23:02:13   ( -70.08,  10.82) 11/24/2025   23:02:48  ( -70.07,  10.80)    0.69                35
 11/24/2025   23:52:57   (  69.98, 178.28) 11/24/2025   23:52:15  (  69.96, 178.28)    2.10                42