Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 10 27.  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)
 10/28/2023   07:59:25   ( -69.96,-123.77) 10/28/2023   08:00:28  ( -69.97,-123.80)    1.93                63
 10/28/2023   08:50:09   (  69.84,  43.72) 10/28/2023   08:49:55  (  69.87,  43.70)    3.42                14
 10/28/2023   09:40:43   ( -69.32,-148.22) 10/28/2023   09:39:32  ( -69.37,-149.34)   44.41                71
 10/31/2023   00:16:24   ( -69.92,  -7.96) 10/31/2023   00:16:58  ( -69.94,  -7.96)    2.76                34
 10/31/2023   01:07:08   (  69.80, 159.52) 10/31/2023   01:06:25  (  69.83, 159.53)    3.59                43
 11/02/2023   15:42:45   (  70.20, -59.95) 11/02/2023   15:43:56  (  70.09, -59.50)   20.70                71
 11/02/2023   16:33:22   ( -69.89, 107.84) 11/02/2023   16:33:27  ( -69.88, 107.83)    0.98                 5
 11/02/2023   17:24:06   (  69.78, -84.68) 11/02/2023   17:22:54  (  69.77, -84.68)    1.01                72
 11/05/2023   07:59:38   (  69.92,  56.23) 11/05/2023   08:00:26  (  69.94,  56.16)    3.39                48
 11/05/2023   08:50:20   ( -69.81,-136.30) 11/05/2023   08:49:56  ( -69.84,-136.34)    3.10                24
 11/07/2023   23:26:08   ( -70.80,   3.28) 11/07/2023   23:27:15  ( -70.69,   5.50)   82.26                67
 11/08/2023   00:16:37   (  69.91, 171.99) 11/08/2023   00:16:54  (  69.92, 172.02)    1.20                17
 11/08/2023   01:07:19   ( -69.80, -20.53) 11/08/2023   01:06:24  ( -69.82, -20.48)    2.26                55