Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 10 8.  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   (  70.67, -41.71) 10/10/2025   14:29:46  (  70.56, -40.27)   54.48                69
 10/10/2025   15:19:08   ( -70.04, 126.61) 10/10/2025   15:19:23  ( -70.07, 126.64)    3.14                15
 10/10/2025   16:09:52   (  69.89, -65.86) 10/10/2025   16:08:51  (  69.91, -65.94)    3.26                61
 10/13/2025   06:45:18   (  70.12,  74.96) 10/13/2025   06:46:24  (  70.13,  74.98)    1.72                66
 10/13/2025   07:35:59   ( -70.00,-117.55) 10/13/2025   07:35:54  ( -70.02,-117.54)    2.23                 5
 10/13/2025   08:26:38   (  69.60,  50.37) 10/13/2025   08:25:26  (  69.64,  49.57)   31.25                72
 10/15/2025   23:02:08   (  70.09,-169.21) 10/15/2025   23:02:53  (  70.11,-169.17)    2.55                45
 10/15/2025   23:52:49   ( -69.98,  -1.72) 10/15/2025   23:52:24  ( -69.95,  -1.76)    3.28                25
 10/18/2025   15:18:59   (  70.07, -53.40) 10/18/2025   15:19:23  (  70.06, -53.36)    2.13                24
 10/18/2025   16:09:40   ( -69.96, 114.10) 10/18/2025   16:08:53  ( -69.96, 114.13)    1.12                47
 10/21/2025   06:45:10   ( -70.41,-105.44) 10/21/2025   06:46:22  ( -70.31,-104.76)   27.50                72
 10/21/2025   07:35:49   (  70.01,  62.49) 10/21/2025   07:35:52  (  70.03,  62.48)    2.05                 3
 10/21/2025   08:26:31   ( -69.95,-130.09) 10/21/2025   08:25:22  ( -69.93,-130.02)    3.16                69