Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 7 15.  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)
 07/15/2025   21:46:51   (  70.76,-151.40) 07/15/2025   21:48:00  (  70.66,-149.78)   60.27                69
 07/15/2025   22:37:22   ( -70.09,  16.98) 07/15/2025   22:37:38  ( -70.11,  17.04)    3.33                16
 07/15/2025   23:28:06   (  69.97,-175.53) 07/15/2025   23:27:06  (  69.95,-175.54)    2.02                60
 07/18/2025   14:03:35   (  70.13, -34.63) 07/18/2025   14:04:40  (  70.14, -34.68)    1.92                65
 07/18/2025   14:54:17   ( -70.03, 132.83) 07/18/2025   14:54:10  ( -70.03, 132.80)    1.25                 7
 07/18/2025   15:44:54   (  69.55, -59.14) 07/18/2025   15:43:43  (  69.59, -60.16)   39.76                71
 07/21/2025   06:20:30   (  70.08,  81.21) 07/21/2025   06:21:11  (  70.09,  81.14)    2.82                41
 07/21/2025   07:11:12   ( -69.98,-111.32) 07/21/2025   07:10:41  ( -69.99,-111.38)    2.34                31
 07/23/2025   21:46:54   ( -70.87,  28.41) 07/23/2025   21:48:02  ( -70.80,  30.42)   73.74                68
 07/23/2025   22:37:25   (  70.09,-163.04) 07/23/2025   22:37:40  (  70.09,-162.99)    2.06                15
 07/23/2025   23:28:07   ( -69.98,   4.45) 07/23/2025   23:27:10  ( -69.99,   4.50)    2.27                57
 07/26/2025   14:03:36   ( -70.14, 145.34) 07/26/2025   14:04:44  ( -70.13, 145.31)    1.70                68
 07/26/2025   14:54:19   (  70.00, -47.13) 07/26/2025   14:54:11  (  70.02, -47.21)    3.41                 8
 07/26/2025   15:44:57   ( -69.67, 120.68) 07/26/2025   15:43:45  ( -69.70, 119.98)   26.88                72