Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 10 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)
 10/25/2025   07:10:20   ( -70.11,-111.28) 10/25/2025   07:11:01  ( -70.11,-111.23)    2.06                41
 10/25/2025   08:01:04   (  69.96,  56.25) 10/25/2025   08:00:29  (  69.96,  56.19)    2.09                35
 10/27/2025   22:36:43   (  70.97,-164.20) 10/27/2025   22:37:49  (  70.87,-161.87)   85.38                66
 10/27/2025   23:27:09   ( -70.07,   4.56) 10/27/2025   23:27:32  ( -70.05,   4.55)    3.00                23
 10/28/2025   00:17:53   (  69.93, 172.09) 10/28/2025   00:16:59  (  69.94, 172.04)    1.88                54
 10/30/2025   14:53:20   (  70.27, -47.26) 10/30/2025   14:54:31  (  70.22, -46.97)   12.56                71
 10/30/2025   15:43:59   ( -70.05, 120.40) 10/30/2025   15:44:02  ( -70.06, 120.44)    1.85                 3
 10/30/2025   16:34:43   (  69.91, -72.09) 10/30/2025   16:33:30  (  69.89, -72.15)    3.07                73
 11/02/2025   07:10:08   (  70.15,  68.71) 11/02/2025   07:11:02  (  70.14,  68.80)    3.47                54
 11/02/2025   08:00:49   ( -70.03,-123.78) 11/02/2025   08:00:32  ( -70.03,-123.72)    2.43                17
 11/02/2025   08:51:19   (  69.15,  44.80) 11/02/2025   08:50:12  (  69.20,  42.80)   79.43                67
 11/04/2025   23:26:57   (  70.09,-175.40) 11/04/2025   23:27:32  (  70.08,-175.41)    1.87                35
 11/05/2025   00:17:38   ( -69.97,  -7.89) 11/05/2025   00:17:02  ( -69.98,  -7.92)    1.59                36
 11/07/2025   14:53:14   ( -70.84, 131.89) 11/07/2025   14:54:22  ( -70.76, 133.83)   71.76                68
 11/07/2025   15:43:45   (  70.05, -59.54) 11/07/2025   15:44:00  (  70.04, -59.58)    1.67                15
 11/07/2025   16:34:27   ( -69.96, 107.91) 11/07/2025   16:33:30  ( -69.94, 107.92)    2.53                57