Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 6 25.  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)
 06/27/2025   06:20:20   ( -70.13, -98.82) 06/27/2025   06:21:04  ( -70.10, -98.86)    3.17                44
 06/27/2025   07:11:04   (  69.98,  68.71) 06/27/2025   07:10:31  (  70.00,  68.64)    3.35                33
 06/29/2025   21:46:46   (  70.80,-151.44) 06/29/2025   21:47:55  (  70.70,-149.74)   63.30                69
 06/29/2025   22:37:16   ( -70.10,  17.00) 06/29/2025   22:37:34  ( -70.10,  17.01)    0.67                18
 06/29/2025   23:28:01   (  70.01,-175.57) 06/29/2025   23:27:01  (  69.99,-175.49)    3.58                60
 07/02/2025   14:03:30   (  70.14, -34.63) 07/02/2025   14:04:35  (  70.13, -34.69)    3.02                65
 07/02/2025   14:54:12   ( -70.07, 132.80) 07/02/2025   14:54:04  ( -70.08, 132.87)    2.75                 8
 07/02/2025   15:44:48   (  69.51, -59.06) 07/02/2025   15:43:38  (  69.58, -60.18)   44.04                70
 07/05/2025   06:20:25   (  70.13,  81.16) 07/05/2025   06:21:03  (  70.15,  81.22)    3.23                38
 07/05/2025   07:11:06   ( -69.99,-111.31) 07/05/2025   07:10:34  ( -69.99,-111.37)    2.28                32
 07/07/2025   21:46:48   ( -70.80,  28.54) 07/07/2025   21:47:57  ( -70.71,  30.28)   64.60                69
 07/07/2025   22:37:21   (  70.11,-163.05) 07/07/2025   22:37:33  (  70.10,-162.97)    3.15                12
 07/07/2025   23:28:02   ( -69.97,   4.49) 07/07/2025   23:27:04  ( -69.95,   4.45)    2.70                58