Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 8 29.  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)
 08/30/2025   06:20:29   ( -70.13, -98.86) 08/30/2025   06:21:24  ( -70.13, -98.82)    1.59                55
 08/30/2025   07:11:12   (  69.98,  68.68) 08/30/2025   07:10:52  (  69.98,  68.61)    2.61                20
 08/30/2025   08:01:41   ( -69.18,-122.84) 08/30/2025   08:00:33  ( -69.26,-124.73)   75.02                68
 09/01/2025   22:37:21   ( -70.06,  17.03) 09/01/2025   22:37:55  ( -70.07,  16.97)    2.75                34
 09/01/2025   23:28:05   (  69.96,-175.52) 09/01/2025   23:27:22  (  69.97,-175.53)    0.96                43
 09/04/2025   14:03:40   (  70.52, -35.24) 09/04/2025   14:04:51  (  70.42, -34.27)   37.52                71
 09/04/2025   14:54:15   ( -70.04, 132.82) 09/04/2025   14:54:26  ( -70.04, 132.81)    0.71                11
 09/04/2025   15:44:59   (  69.95, -59.72) 09/04/2025   15:43:53  (  69.93, -59.70)    1.79                66
 09/07/2025   06:20:26   (  70.10,  81.20) 09/07/2025   06:21:27  (  70.09,  81.12)    3.02                61
 09/07/2025   07:11:08   ( -69.99,-111.32) 09/07/2025   07:10:57  ( -69.99,-111.39)    2.86                11
 09/07/2025   08:01:42   (  69.36,  56.92) 09/07/2025   08:00:32  (  69.44,  55.50)   56.14                70
 09/09/2025   22:37:20   (  70.10,-163.03) 09/09/2025   22:37:57  (  70.07,-163.03)    3.56                37
 09/09/2025   23:28:02   ( -69.99,   4.45) 09/09/2025   23:27:27  ( -69.97,   4.46)    3.05                35
 09/12/2025   14:03:41   ( -70.78, 144.35) 09/12/2025   14:04:50  ( -70.68, 146.10)   65.35                69
 09/12/2025   14:54:12   (  70.06, -47.19) 09/12/2025   14:54:25  (  70.07, -47.14)    2.54                13
 09/12/2025   15:44:54   ( -69.95, 120.29) 09/12/2025   15:43:55  ( -69.97, 120.35)    3.32                59