Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 7 23.  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)
 07/23/2025   21:46:55   ( -70.91,  28.35) 07/23/2025   21:48:02  ( -70.81,  30.43)   76.65                67
 07/23/2025   22:37:25   (  70.07,-163.00) 07/23/2025   22:37:41  (  70.05,-163.04)    2.42                16
 07/23/2025   23:28:07   ( -69.97,   4.47) 07/23/2025   23:27:11  ( -69.94,   4.44)    3.35                56
 07/26/2025   14:03:36   ( -70.13, 145.36) 07/26/2025   14:04:44  ( -70.13, 145.31)    2.23                68
 07/26/2025   14:54:20   (  70.03, -47.17) 07/26/2025   14:54:11  (  70.02, -47.20)    1.57                 9
 07/26/2025   15:44:57   ( -69.66, 120.70) 07/26/2025   15:43:45  ( -69.69, 119.98)   27.97                72
 07/29/2025   06:20:30   ( -70.09, -98.81) 07/29/2025   06:21:13  ( -70.08, -98.87)    2.78                43
 07/29/2025   07:11:14   (  70.00,  68.64) 07/29/2025   07:10:40  (  69.97,  68.62)    3.36                34
 07/31/2025   21:46:54   (  70.76,-151.41) 07/31/2025   21:48:03  (  70.67,-149.76)   61.46                69
 07/31/2025   22:37:25   ( -70.06,  17.01) 07/31/2025   22:37:42  ( -70.07,  17.00)    1.54                17
 07/31/2025   23:28:09   (  69.97,-175.55) 07/31/2025   23:27:09  (  69.96,-175.52)    1.96                60
 08/03/2025   14:03:38   (  70.16, -34.68) 08/03/2025   14:04:41  (  70.14, -34.65)    1.99                63
 08/03/2025   14:54:20   ( -70.03, 132.82) 08/03/2025   14:54:11  ( -70.04, 132.84)    1.67                 9
 08/03/2025   15:44:55   (  69.47, -59.04) 08/03/2025   15:43:45  (  69.54, -60.21)   46.03                70