Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 8 18.  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)
 08/19/2025   14:03:39   (  70.25, -34.82) 08/19/2025   14:04:51  (  70.20, -34.59)    9.89                72
 08/19/2025   14:54:19   ( -70.02, 132.84) 08/19/2025   14:54:22  ( -70.03, 132.80)    2.05                 3
 08/19/2025   15:45:02   (  69.88, -59.64) 08/19/2025   15:43:50  (  69.88, -59.78)    5.30                72
 08/22/2025   06:20:31   (  70.10,  81.18) 08/22/2025   06:21:22  (  70.10,  81.14)    1.46                51
 08/22/2025   07:11:13   ( -69.98,-111.32) 08/22/2025   07:10:52  ( -69.99,-111.38)    2.71                21
 08/22/2025   08:01:40   (  68.99,  57.42) 08/22/2025   08:00:34  (  69.05,  55.00)   96.35                66
 08/24/2025   22:37:24   (  70.06,-162.99) 08/24/2025   22:37:50  (  70.09,-162.98)    3.56                26
 08/24/2025   23:28:07   ( -69.99,   4.43) 08/24/2025   23:27:20  ( -69.98,   4.50)    2.44                47
 08/27/2025   14:03:39   ( -70.37, 145.00) 08/27/2025   14:04:50  ( -70.29, 145.54)   22.23                71
 08/27/2025   14:54:18   (  70.03, -47.16) 08/27/2025   14:54:20  (  70.01, -47.21)    2.34                 2
 08/27/2025   15:45:00   ( -69.90, 120.34) 08/27/2025   15:43:50  ( -69.91, 120.27)    2.60                70
 08/30/2025   06:20:29   ( -70.13, -98.86) 08/30/2025   06:21:21  ( -70.14, -98.79)    2.99                52
 08/30/2025   07:11:12   (  69.99,  68.66) 08/30/2025   07:10:49  (  69.97,  68.62)    2.83                23