Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 6 21.  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)
 06/21/2025   21:46:43   ( -70.95,  28.34) 06/21/2025   21:47:50  ( -70.87,  30.52)   79.94                67
 06/21/2025   22:37:14   (  70.12,-163.03) 06/21/2025   22:37:29  (  70.12,-162.95)    2.69                15
 06/21/2025   23:27:55   ( -70.01,   4.46) 06/21/2025   23:26:59  ( -70.01,   4.52)    2.23                56
 06/24/2025   14:03:25   ( -70.18, 145.34) 06/24/2025   14:04:33  ( -70.19, 145.38)    1.56                68
 06/24/2025   14:54:09   (  70.03, -47.13) 06/24/2025   14:54:01  (  70.03, -47.21)    3.02                 8
 06/24/2025   15:44:46   ( -69.71, 120.68) 06/24/2025   15:43:34  ( -69.75, 120.05)   24.74                72
 06/27/2025   06:20:21   ( -70.15, -98.85) 06/27/2025   06:21:04  ( -70.14, -98.81)    1.58                43
 06/27/2025   07:11:05   (  70.01,  68.67) 06/27/2025   07:10:31  (  70.03,  68.68)    2.49                34
 06/29/2025   21:46:46   (  70.82,-151.48) 06/29/2025   21:47:54  (  70.73,-149.69)   66.23                68
 06/29/2025   22:37:15   ( -70.06,  17.05) 06/29/2025   22:37:34  ( -70.08,  16.98)    2.83                19
 06/29/2025   23:28:00   (  69.98,-175.52) 06/29/2025   23:27:01  (  69.97,-175.53)    2.00                59
 07/02/2025   14:03:30   (  70.17, -34.67) 07/02/2025   14:04:34  (  70.16, -34.65)    1.59                64
 07/02/2025   14:54:11   ( -70.04, 132.85) 07/02/2025   14:54:04  ( -70.06, 132.84)    2.48                 7
 07/02/2025   15:44:48   (  69.54, -59.10) 07/02/2025   15:43:37  (  69.61, -60.14)   41.03                71