Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 10 28.  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   ( -69.97,-123.79) 10/28/2023   08:00:28  ( -69.96,-123.81)    1.25                63
 10/28/2023   08:50:09   (  69.85,  43.70) 10/28/2023   08:49:55  (  69.86,  43.69)    1.28                14
 10/28/2023   09:40:43   ( -69.33,-148.23) 10/28/2023   09:39:32  ( -69.36,-149.35)   44.11                71
 10/31/2023   00:16:24   ( -69.93,  -7.97) 10/31/2023   00:16:58  ( -69.94,  -7.97)    0.68                34
 10/31/2023   01:07:08   (  69.81, 159.51) 10/31/2023   01:06:25  (  69.83, 159.52)    1.77                43
 11/02/2023   15:42:44   (  70.16, -59.89) 11/02/2023   15:43:56  (  70.09, -59.51)   16.08                72
 11/02/2023   16:33:23   ( -69.90, 107.82) 11/02/2023   16:33:28  ( -69.88, 107.82)    2.51                 5
 11/02/2023   17:24:07   (  69.78, -84.70) 11/02/2023   17:22:55  (  69.76, -84.69)    2.45                72
 11/05/2023   07:59:38   (  69.93,  56.22) 11/05/2023   08:00:26  (  69.94,  56.17)    2.42                48
 11/05/2023   08:50:20   ( -69.82,-136.31) 11/05/2023   08:49:56  ( -69.84,-136.34)    1.96                24
 11/07/2023   23:26:08   ( -70.81,   3.27) 11/07/2023   23:27:15  ( -70.70,   5.51)   83.16                67
 11/08/2023   00:16:37   (  69.92, 171.98) 11/08/2023   00:16:54  (  69.92, 172.03)    1.98                17
 11/08/2023   01:07:19   ( -69.81, -20.54) 11/08/2023   01:06:24  ( -69.82, -20.48)    2.86                55
 11/10/2023   15:42:51   ( -69.97, 120.35) 11/10/2023   15:43:55  ( -70.00, 120.37)    3.05                64
 11/10/2023   16:33:35   (  69.87, -72.19) 11/10/2023   16:33:22  (  69.88, -72.15)    1.83                13
 11/10/2023   17:24:10   ( -69.39,  95.83) 11/10/2023   17:22:58  ( -69.45,  94.90)   36.87                72