Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 11 9.  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)
 11/10/2023   15:42:49   ( -69.96, 120.37) 11/10/2023   15:43:52  ( -69.96, 120.33)    1.80                63
 11/10/2023   16:33:33   (  69.84, -72.15) 11/10/2023   16:33:19  (  69.85, -72.18)    1.76                14
 11/10/2023   17:24:07   ( -69.32,  95.93) 11/10/2023   17:22:56  ( -69.35,  94.78)   45.12                71
 11/13/2023   07:59:47   ( -69.94,-123.84) 11/13/2023   08:00:18  ( -69.91,-123.84)    3.03                31
 11/13/2023   08:50:31   (  69.83,  43.64) 11/13/2023   08:49:45  (  69.80,  43.65)    2.92                46
 11/15/2023   23:26:02   (  69.98,-175.46) 11/15/2023   23:27:13  (  69.98,-175.48)    0.61                71
 11/16/2023   00:16:44   ( -69.88,  -7.99) 11/16/2023   00:16:43  ( -69.87,  -8.00)    0.97                 1
 11/16/2023   01:07:25   (  69.61, 159.71) 11/16/2023   01:06:12  (  69.65, 159.34)   14.95                73
 11/18/2023   15:42:59   (  69.94, -59.64) 11/18/2023   15:43:37  (  69.95, -59.62)    1.15                38
 11/18/2023   16:33:41   ( -69.83, 107.83) 11/18/2023   16:33:07  ( -69.84, 107.86)    1.22                34
 11/21/2023   07:09:18   ( -70.32,-111.78) 11/21/2023   07:10:29  ( -70.26,-110.91)   33.38                71
 11/21/2023   07:59:54   (  69.86,  56.24) 11/21/2023   08:00:00  (  69.87,  56.17)    2.98                 6
 11/21/2023   08:50:36   ( -69.75,-136.28) 11/21/2023   08:49:30  ( -69.76,-136.34)    2.79                66