Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 10 5.  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)
 10/05/2025   06:45:26   ( -70.13,-105.10) 10/05/2025   06:46:20  ( -70.12,-105.03)    3.02                54
 10/05/2025   07:36:10   (  69.99,  62.43) 10/05/2025   07:35:48  (  69.96,  62.39)    3.17                22
 10/05/2025   08:26:38   ( -69.19,-129.09) 10/05/2025   08:25:29  ( -69.24,-130.95)   73.53                69
 10/07/2025   23:02:17   ( -70.08,  10.76) 10/07/2025   23:02:52  ( -70.08,  10.79)    0.90                35
 10/07/2025   23:53:02   (  69.99, 178.21) 10/07/2025   23:52:19  (  69.97, 178.28)    3.38                43
 10/10/2025   14:28:37   (  70.68, -41.72) 10/10/2025   14:29:46  (  70.54, -40.29)   54.64                69
 10/10/2025   15:19:08   ( -70.04, 126.61) 10/10/2025   15:19:23  ( -70.05, 126.63)    1.62                15
 10/10/2025   16:09:53   (  69.95, -65.95) 10/10/2025   16:08:50  (  69.95, -65.88)    2.68                63
 10/13/2025   06:45:18   (  70.13,  74.95) 10/13/2025   06:46:23  (  70.14,  75.00)    2.84                65
 10/13/2025   07:35:59   ( -70.01,-117.56) 10/13/2025   07:35:54  ( -69.99,-117.59)    3.08                 5
 10/13/2025   08:26:37   (  69.55,  50.43) 10/13/2025   08:25:26  (  69.60,  49.52)   35.61                71
 10/15/2025   23:02:08   (  70.11,-169.24) 10/15/2025   23:02:52  (  70.09,-169.20)    3.29                44
 10/15/2025   23:52:49   ( -70.00,  -1.74) 10/15/2025   23:52:22  ( -69.99,  -1.71)    1.81                27
 10/18/2025   15:18:58   (  70.06, -53.37) 10/18/2025   15:19:21  (  70.04, -53.38)    1.70                23
 10/18/2025   16:09:39   ( -69.94, 114.13) 10/18/2025   16:08:51  ( -69.94, 114.12)    0.84                48