Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 9 12.  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   06:20:21   ( -70.13, -98.82) 09/15/2025   06:21:30  ( -70.13, -98.83)    0.84                69
 09/15/2025   07:11:05   (  70.01,  68.66) 09/15/2025   07:10:57  (  70.03,  68.67)    2.27                 8
 09/15/2025   08:01:43   ( -69.71,-123.57) 09/15/2025   08:00:30  ( -69.76,-124.08)   20.28                73
 09/17/2025   22:37:14   ( -70.09,  17.01) 09/17/2025   22:38:02  ( -70.08,  16.97)    1.69                48
 09/17/2025   23:27:58   (  69.98,-175.51) 09/17/2025   23:27:29  (  69.98,-175.53)    0.98                29
 09/20/2025   14:03:42   (  71.09, -36.15) 09/20/2025   14:04:47  (  71.01, -33.41)   99.55                65
 09/20/2025   14:54:06   ( -70.06, 132.83) 09/20/2025   14:54:32  ( -70.08, 132.85)    2.18                26
 09/20/2025   15:44:50   (  69.95, -59.68) 09/20/2025   15:43:59  (  69.97, -59.66)    3.27                51
 09/23/2025   06:20:21   (  70.33,  80.87) 09/23/2025   06:21:32  (  70.23,  81.30)   19.61                71
 09/23/2025   07:10:59   ( -70.04,-111.35) 09/23/2025   07:11:04  ( -70.02,-111.37)    2.13                 5
 09/23/2025   08:01:43   (  69.92,  56.14) 09/23/2025   08:00:31  (  69.91,  56.12)    1.33                72
 09/25/2025   22:37:10   (  70.10,-162.98) 09/25/2025   22:38:05  (  70.10,-163.01)    1.02                55
 09/25/2025   23:27:52   ( -70.02,   4.46) 09/25/2025   23:27:35  ( -70.00,   4.48)    1.52                17
 09/26/2025   00:18:22   (  69.15, 173.03) 09/26/2025   00:17:14  (  69.23, 171.07)   77.67                68