Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 9 8.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 09/09/2025   22:37:19   (  70.08,-163.00) 09/09/2025   22:37:55  (  70.06,-163.04)    2.79                36
 09/09/2025   23:28:01   ( -69.99,   4.47) 09/09/2025   23:27:24  ( -70.00,   4.51)    2.38                37
 09/12/2025   14:03:39   ( -70.73, 144.45) 09/12/2025   14:04:48  ( -70.63, 146.04)   59.42                69
 09/12/2025   14:54:12   (  70.04, -47.16) 09/12/2025   14:54:24  (  70.04, -47.18)    0.97                12
 09/12/2025   15:44:54   ( -69.95, 120.30) 09/12/2025   15:43:54  ( -69.93, 120.29)    1.97                60
 09/15/2025   06:20:21   ( -70.12, -98.80) 09/15/2025   06:21:26  ( -70.11, -98.85)    1.92                65
 09/15/2025   07:11:05   (  70.00,  68.67) 09/15/2025   07:10:53  (  70.00,  68.65)    1.26                12
 09/15/2025   08:01:40   ( -69.54,-123.32) 09/15/2025   08:00:29  ( -69.56,-124.33)   39.04                71
 09/17/2025   22:37:13   ( -70.09,  17.02) 09/17/2025   22:37:53  ( -70.10,  17.04)    1.81                40
 09/17/2025   23:27:57   (  69.98,-175.51) 09/17/2025   23:27:20  (  69.99,-175.48)    2.09                37
 09/20/2025   14:03:34   (  70.68, -35.46) 09/20/2025   14:04:43  (  70.62, -33.95)   56.30                69
 09/20/2025   14:54:06   ( -70.07, 132.83) 09/20/2025   14:54:21  ( -70.08, 132.89)    2.75                15
 09/20/2025   15:44:50   (  69.95, -59.69) 09/20/2025   15:43:48  (  69.97, -59.62)    2.90                62