Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 10 2.  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)
 10/02/2023   23:50:53   (  69.99, 178.34) 10/02/2023   23:52:04  (  69.99, 178.32)    0.74                71
 10/03/2023   00:41:34   ( -69.86, -14.14) 10/03/2023   00:41:34  ( -69.88, -14.19)    3.15                 0
 10/03/2023   01:32:16   (  69.63, 153.51) 10/03/2023   01:31:03  (  69.66, 153.15)   14.31                73
 10/05/2023   16:07:46   (  69.94, -65.80) 10/05/2023   16:08:36  (  69.94, -65.87)    2.77                50
 10/05/2023   16:58:28   ( -69.85, 101.64) 10/05/2023   16:58:06  ( -69.83, 101.61)    2.64                22
 10/05/2023   17:48:55   (  68.82, -89.59) 10/05/2023   17:47:49  (  68.84, -92.06)   99.15                66
 10/08/2023   08:24:39   (  69.95,  49.96) 10/08/2023   08:25:05  (  69.95,  50.03)    2.87                26
 10/08/2023   09:15:20   ( -69.81,-142.51) 10/08/2023   09:14:36  ( -69.80,-142.56)    1.97                44
 10/10/2023   23:50:54   ( -70.34,  -2.19) 10/10/2023   23:52:05  ( -70.21,  -1.37)   33.91                71
 10/11/2023   00:41:31   (  69.86, 165.86) 10/11/2023   00:41:36  (  69.88, 165.80)    2.62                 5
 10/11/2023   01:32:13   ( -69.77, -26.69) 10/11/2023   01:31:06  ( -69.78, -26.70)    0.92                67
 10/13/2023   16:07:40   ( -69.95, 114.19) 10/13/2023   16:08:39  ( -69.93, 114.12)    3.38                59
 10/13/2023   16:58:24   (  69.85, -78.34) 10/13/2023   16:58:05  (  69.87, -78.32)    3.08                19
 10/13/2023   17:48:55   ( -69.17,  89.96) 10/13/2023   17:47:45  ( -69.22,  88.43)   60.49                70