Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 11 19.  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)
 11/21/2023   07:59:57   (  69.93,  56.12) 11/21/2023   08:00:30  (  69.91,  56.10)    2.64                33
 11/21/2023   08:50:39   ( -69.83,-136.41) 11/21/2023   08:49:59  ( -69.85,-136.34)    3.42                40
 11/23/2023   23:26:16   ( -70.37,   3.90) 11/23/2023   23:27:27  ( -70.28,   4.87)   37.50                71
 11/24/2023   00:16:53   (  69.89, 171.94) 11/24/2023   00:16:59  (  69.90, 171.97)    1.55                 6
 11/24/2023   01:07:35   ( -69.79, -20.59) 11/24/2023   01:06:29  ( -69.79, -20.55)    1.76                66
 11/26/2023   15:43:06   ( -69.97, 120.28) 11/26/2023   15:44:02  ( -69.99, 120.32)    2.58                56
 11/26/2023   16:33:50   (  69.86, -72.25) 11/26/2023   16:33:29  (  69.88, -72.18)    3.04                21
 11/26/2023   17:24:19   ( -69.07,  96.21) 11/26/2023   17:23:10  ( -69.17,  94.49)   68.86                69
 11/29/2023   08:00:03   ( -69.94,-123.92) 11/29/2023   08:00:32  ( -69.95,-123.86)    2.44                29
 11/29/2023   08:50:46   (  69.79,  43.62) 11/29/2023   08:50:00  (  69.78,  43.56)    2.66                46
 12/01/2023   23:26:19   (  70.09,-175.69) 12/01/2023   23:27:31  (  70.04,-175.47)    9.55                72
 12/02/2023   00:16:59   ( -69.87,  -8.05) 12/02/2023   00:17:02  ( -69.89,  -8.06)    1.97                 3
 12/02/2023   01:07:42   (  69.72, 159.49) 12/02/2023   01:06:30  (  69.72, 159.35)    5.21                72