Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 6 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)
 06/19/2025   06:20:18   (  70.15,  81.17) 06/19/2025   06:20:58  (  70.15,  81.21)    1.70                40
 06/19/2025   07:10:59   ( -70.04,-111.35) 06/19/2025   07:10:28  ( -70.04,-111.31)    1.22                31
 06/21/2025   21:46:43   ( -70.94,  28.35) 06/21/2025   21:47:51  ( -70.83,  30.45)   77.45                68
 06/21/2025   22:37:14   (  70.11,-163.02) 06/21/2025   22:37:29  (  70.12,-162.95)    2.68                15
 06/21/2025   23:27:55   ( -70.00,   4.48) 06/21/2025   23:26:59  ( -70.01,   4.53)    2.58                56
 06/24/2025   14:03:25   ( -70.17, 145.35) 06/24/2025   14:04:33  ( -70.19, 145.38)    1.78                68
 06/24/2025   14:54:10   (  70.08, -47.21) 06/24/2025   14:54:00  (  70.08, -47.13)    2.98                10
 06/24/2025   15:44:46   ( -69.70, 120.69) 06/24/2025   15:43:34  ( -69.75, 120.05)   25.28                72
 06/27/2025   06:20:20   ( -70.14, -98.84) 06/27/2025   06:21:03  ( -70.13, -98.83)    1.76                43
 06/27/2025   07:11:04   (  70.01,  68.67) 06/27/2025   07:10:30  (  70.01,  68.66)    0.97                34
 06/29/2025   21:46:46   (  70.83,-151.49) 06/29/2025   21:47:54  (  70.70,-149.73)   65.74                68
 06/29/2025   22:37:16   ( -70.12,  16.96) 06/29/2025   22:37:33  ( -70.11,  17.03)    2.68                17
 06/29/2025   23:28:00   (  69.99,-175.53) 06/29/2025   23:27:00  (  69.99,-175.49)    1.56                60