Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 7 5.  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)
 07/05/2025   06:20:25   (  70.11,  81.19) 07/05/2025   06:21:04  (  70.11,  81.16)    1.21                39
 07/05/2025   07:11:06   ( -69.99,-111.30) 07/05/2025   07:10:34  ( -69.99,-111.37)    2.70                32
 07/07/2025   21:46:48   ( -70.80,  28.55) 07/07/2025   21:47:57  ( -70.70,  30.28)   64.33                69
 07/07/2025   22:37:21   (  70.10,-163.02) 07/07/2025   22:37:33  (  70.11,-162.95)    2.91                12
 07/07/2025   23:28:02   ( -69.97,   4.49) 07/07/2025   23:27:04  ( -69.94,   4.45)    3.09                58
 07/10/2025   14:03:32   ( -70.16, 145.34) 07/10/2025   14:04:36  ( -70.15, 145.34)    0.91                64
 07/10/2025   14:54:16   (  70.04, -47.16) 07/10/2025   14:54:03  (  70.04, -47.17)    0.47                13
 07/10/2025   15:44:50   ( -69.53, 120.91) 07/10/2025   15:43:39  ( -69.60, 119.86)   41.47                71
 07/13/2025   06:20:27   ( -70.14, -98.87) 07/13/2025   06:21:04  ( -70.13, -98.80)    3.35                37
 07/13/2025   07:11:11   (  70.03,  68.61) 07/13/2025   07:10:31  (  70.01,  68.68)    3.35                40
 07/15/2025   21:46:48   (  70.60,-151.15) 07/15/2025   21:47:58  (  70.46,-150.06)   43.31                70
 07/15/2025   22:37:22   ( -70.08,  16.99) 07/15/2025   22:37:33  ( -70.09,  17.03)    1.54                11
 07/15/2025   23:28:06   (  69.98,-175.54) 07/15/2025   23:27:00  (  69.97,-175.49)    1.93                66
 07/18/2025   14:03:35   (  70.13, -34.63) 07/18/2025   14:04:32  (  70.13, -34.65)    0.66                57
 07/18/2025   14:54:17   ( -70.02, 132.85) 07/18/2025   14:54:02  ( -70.03, 132.84)    1.16                15
 07/18/2025   15:44:48   (  69.23, -58.69) 07/18/2025   15:43:40  (  69.31, -60.51)   72.06                68