Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 10 13.  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)
 10/14/2025   14:53:43   (  70.08, -47.09) 10/14/2025   14:54:33  (  70.09, -47.14)    2.08                50
 10/14/2025   15:44:24   ( -69.98, 120.39) 10/14/2025   15:44:03  ( -69.98, 120.33)    2.02                21
 10/14/2025   16:34:52   (  68.98, -70.87) 10/14/2025   16:33:46  (  68.99, -73.35)   99.06                66
 10/17/2025   07:10:33   (  70.06,  68.72) 10/17/2025   07:11:01  (  70.06,  68.70)    0.85                28
 10/17/2025   08:01:14   ( -69.96,-123.79) 10/17/2025   08:00:31  ( -69.95,-123.82)    1.17                43
 10/19/2025   22:36:47   ( -70.56,  16.42) 10/19/2025   22:37:57  ( -70.44,  17.49)   41.82                70
 10/19/2025   23:27:24   (  70.06,-175.47) 10/19/2025   23:27:29  (  70.06,-175.42)    2.05                 5
 10/20/2025   00:18:05   ( -69.95,  -7.99) 10/20/2025   00:16:59  ( -69.95,  -7.94)    1.92                66
 10/22/2025   14:53:30   ( -70.14, 132.88) 10/22/2025   14:54:30  ( -70.14, 132.93)    1.99                60
 10/22/2025   15:44:14   (  70.00, -59.60) 10/22/2025   15:43:57  (  70.02, -59.58)    2.66                17
 10/22/2025   16:34:46   ( -69.41, 108.59) 10/22/2025   16:33:36  ( -69.42, 107.23)   53.21                70
 10/25/2025   07:10:20   ( -70.09,-111.25) 10/25/2025   07:10:58  ( -70.08,-111.26)    1.72                38
 10/25/2025   08:01:04   (  69.96,  56.26) 10/25/2025   08:00:25  (  69.96,  56.22)    1.53                39