Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 7 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)
 07/18/2025   14:03:35   (  70.13, -34.63) 07/18/2025   14:04:40  (  70.13, -34.68)    1.87                65
 07/18/2025   14:54:17   ( -70.04, 132.83) 07/18/2025   14:54:10  ( -70.02, 132.79)    2.21                 7
 07/18/2025   15:44:54   (  69.55, -59.14) 07/18/2025   15:43:43  (  69.59, -60.16)   39.78                71
 07/21/2025   06:20:30   (  70.09,  81.21) 07/21/2025   06:21:11  (  70.09,  81.13)    2.77                41
 07/21/2025   07:11:12   ( -69.99,-111.33) 07/21/2025   07:10:41  ( -69.98,-111.39)    2.40                31
 07/23/2025   21:46:54   ( -70.88,  28.40) 07/23/2025   21:48:02  ( -70.79,  30.41)   73.86                68
 07/23/2025   22:37:25   (  70.10,-163.04) 07/23/2025   22:37:40  (  70.08,-162.99)    2.40                15
 07/23/2025   23:28:07   ( -69.99,   4.44) 07/23/2025   23:27:10  ( -69.98,   4.49)    2.46                57
 07/26/2025   14:03:36   ( -70.15, 145.33) 07/26/2025   14:04:44  ( -70.12, 145.30)    3.26                68
 07/26/2025   14:54:19   (  70.01, -47.14) 07/26/2025   14:54:11  (  70.01, -47.21)    3.02                 8
 07/26/2025   15:44:57   ( -69.68, 120.66) 07/26/2025   15:43:44  ( -69.75, 120.05)   24.83                73
 07/29/2025   06:20:31   ( -70.11, -98.84) 07/29/2025   06:21:14  ( -70.10, -98.86)    1.75                43
 07/29/2025   07:11:14   (  69.97,  68.68) 07/29/2025   07:10:41  (  69.98,  68.63)    2.47                33
 07/31/2025   21:46:56   (  70.83,-151.53) 07/31/2025   21:48:04  (  70.70,-149.72)   68.11                68
 07/31/2025   22:37:26   ( -70.07,  16.99) 07/31/2025   22:37:44  ( -70.05,  16.97)    2.23                18
 07/31/2025   23:28:09   (  69.94,-175.50) 07/31/2025   23:27:11  (  69.94,-175.55)    2.05                58