Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 10 3.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-9) LANDSAT-9 Lat/Lon    Distance(km)  Time Diff(sec)
 10/05/2023   16:07:46   (  69.95, -65.82) 10/05/2023   16:08:35  (  69.98, -65.82)    2.74                49
 10/05/2023   16:58:28   ( -69.87, 101.62) 10/05/2023   16:58:05  ( -69.87, 101.67)    1.78                23
 10/05/2023   17:48:54   (  68.79, -89.54) 10/05/2023   17:47:48  (  68.88, -92.01)   99.69                66
 10/08/2023   08:24:39   (  69.91,  50.01) 10/08/2023   08:25:06  (  69.94,  50.00)    3.09                27
 10/08/2023   09:15:21   ( -69.82,-142.54) 10/08/2023   09:14:36  ( -69.83,-142.51)    1.71                45
 10/10/2023   23:50:54   ( -70.31,  -2.13) 10/10/2023   23:52:06  ( -70.19,  -1.40)   30.48                72
 10/11/2023   00:41:32   (  69.88, 165.83) 10/11/2023   00:41:37  (  69.86, 165.78)    3.24                 5
 10/11/2023   01:32:13   ( -69.79, -26.72) 10/11/2023   01:31:05  ( -69.81, -26.66)    3.37                68
 10/13/2023   16:07:40   ( -69.97, 114.16) 10/13/2023   16:08:38  ( -69.97, 114.16)    0.74                58
 10/13/2023   16:58:24   (  69.87, -78.37) 10/13/2023   16:58:05  (  69.85, -78.35)    1.77                19
 10/13/2023   17:48:54   ( -69.13,  90.00) 10/13/2023   17:47:45  ( -69.20,  88.40)   63.66                69
 10/16/2023   08:24:32   ( -69.91,-129.97) 10/16/2023   08:25:07  ( -69.92,-130.01)    1.75                35
 10/16/2023   09:15:16   (  69.81,  37.49) 10/16/2023   09:14:34  (  69.80,  37.47)    1.14                42