Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 6 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)
 06/16/2025   14:03:22   (  70.16, -34.61) 06/16/2025   14:04:28  (  70.14, -34.68)    3.43                66
 06/16/2025   14:54:04   ( -70.10, 132.79) 06/16/2025   14:53:57  ( -70.08, 132.87)    3.52                 7
 06/16/2025   15:44:41   (  69.58, -59.12) 06/16/2025   15:43:30  (  69.65, -60.09)   38.41                71
 06/19/2025   06:20:18   (  70.12,  81.21) 06/19/2025   06:20:59  (  70.13,  81.18)    1.67                41
 06/19/2025   07:10:59   ( -70.00,-111.30) 06/19/2025   07:10:29  ( -70.02,-111.34)    2.46                30
 06/21/2025   21:46:43   ( -70.96,  28.32) 06/21/2025   21:47:50  ( -70.87,  30.51)   80.51                67
 06/21/2025   22:37:13   (  70.09,-162.97) 06/21/2025   22:37:29  (  70.10,-162.98)    2.03                16
 06/21/2025   23:27:55   ( -70.02,   4.44) 06/21/2025   23:26:59  ( -70.00,   4.51)    3.41                56
 06/24/2025   14:03:25   ( -70.20, 145.31) 06/24/2025   14:04:33  ( -70.17, 145.36)    3.01                68
 06/24/2025   14:54:09   (  70.06, -47.17) 06/24/2025   14:54:00  (  70.06, -47.16)    0.47                 9
 06/24/2025   15:44:46   ( -69.73, 120.65) 06/24/2025   15:43:33  ( -69.80, 120.10)   22.45                73
 06/27/2025   06:20:20   ( -70.12, -98.80) 06/27/2025   06:21:04  ( -70.12, -98.84)    1.63                44
 06/27/2025   07:11:04   (  69.98,  68.71) 06/27/2025   07:10:31  (  70.00,  68.64)    3.18                33