Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 9 3.  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)
 09/04/2025   14:03:40   (  70.53, -35.26) 09/04/2025   14:04:50  (  70.44, -34.25)   38.74                70
 09/04/2025   14:54:15   ( -70.06, 132.80) 09/04/2025   14:54:25  ( -70.05, 132.82)    1.34                10
 09/04/2025   15:44:59   (  69.96, -59.74) 09/04/2025   15:43:52  (  69.95, -59.68)    2.57                67
 09/07/2025   06:20:26   (  70.11,  81.18) 09/07/2025   06:21:25  (  70.11,  81.16)    0.64                59
 09/07/2025   07:11:08   ( -70.01,-111.35) 09/07/2025   07:10:55  ( -70.00,-111.36)    1.02                13
 09/07/2025   08:01:41   (  69.33,  56.97) 09/07/2025   08:00:32  (  69.34,  55.38)   62.22                69
 09/09/2025   22:37:19   (  70.08,-162.99) 09/09/2025   22:37:54  (  70.08,-163.01)    0.75                35
 09/09/2025   23:28:01   ( -69.97,   4.48) 09/09/2025   23:27:24  ( -69.97,   4.47)    0.56                37
 09/12/2025   14:03:38   ( -70.67, 144.54) 09/12/2025   14:04:48  ( -70.55, 145.92)   53.15                70
 09/12/2025   14:54:12   (  70.05, -47.17) 09/12/2025   14:54:22  (  70.05, -47.15)    1.02                10
 09/12/2025   15:44:54   ( -69.95, 120.30) 09/12/2025   15:43:52  ( -69.95, 120.33)    1.28                62
 09/15/2025   06:20:20   ( -70.14, -98.83) 09/15/2025   06:21:22  ( -70.11, -98.83)    3.29                62
 09/15/2025   07:11:03   (  69.98,  68.72) 09/15/2025   07:10:49  (  69.99,  68.65)    2.82                14
 09/15/2025   08:01:37   ( -69.46,-123.20) 09/15/2025   08:00:26  ( -69.50,-124.39)   46.72                71