Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 9 14.  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)
 09/15/2025   06:20:22   ( -70.16, -98.88) 09/15/2025   06:21:30  ( -70.14, -98.82)    3.18                68
 09/15/2025   07:11:06   (  70.05,  68.61) 09/15/2025   07:10:57  (  70.04,  68.69)    2.88                 9
 09/15/2025   08:01:43   ( -69.70,-123.55) 09/15/2025   08:00:30  ( -69.77,-124.07)   21.55                73
 09/17/2025   22:37:13   ( -70.08,  17.03) 09/17/2025   22:38:01  ( -70.08,  16.97)    2.41                48
 09/17/2025   23:27:57   (  69.96,-175.48) 09/17/2025   23:27:28  (  69.98,-175.54)    2.57                29
 09/20/2025   14:03:42   (  71.08, -36.13) 09/20/2025   14:04:47  (  70.98, -33.44)   97.70                65
 09/20/2025   14:54:06   ( -70.05, 132.85) 09/20/2025   14:54:32  ( -70.05, 132.81)    1.52                26
 09/20/2025   15:44:50   (  69.93, -59.66) 09/20/2025   15:43:59  (  69.95, -59.70)    1.99                51
 09/23/2025   06:20:20   (  70.27,  80.97) 09/23/2025   06:21:31  (  70.23,  81.30)   13.53                71
 09/23/2025   07:10:59   ( -70.03,-111.34) 09/23/2025   07:11:03  ( -70.01,-111.37)    2.33                 4
 09/23/2025   08:01:43   (  69.91,  56.15) 09/23/2025   08:00:30  (  69.90,  56.12)    1.38                73
 09/25/2025   22:37:10   (  70.10,-162.98) 09/25/2025   22:38:03  (  70.12,-162.98)    1.94                53
 09/25/2025   23:27:52   ( -70.02,   4.46) 09/25/2025   23:27:33  ( -70.02,   4.51)    1.85                19
 09/26/2025   00:18:21   (  69.10, 173.10) 09/26/2025   00:17:14  (  69.13, 170.95)   85.32                67