Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 10 4.  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   (  69.93, -65.79) 10/05/2023   16:08:36  (  69.94, -65.87)    3.35                50
 10/05/2023   16:58:28   ( -69.85, 101.65) 10/05/2023   16:58:06  ( -69.83, 101.62)    1.83                22
 10/05/2023   17:48:55   (  68.82, -89.58) 10/05/2023   17:47:49  (  68.84, -92.05)   99.34                66
 10/08/2023   08:24:39   (  69.94,  49.97) 10/08/2023   08:25:05  (  69.96,  50.03)    3.15                26
 10/08/2023   09:15:20   ( -69.80,-142.51) 10/08/2023   09:14:36  ( -69.80,-142.56)    2.00                44
 10/10/2023   23:50:54   ( -70.34,  -2.18) 10/10/2023   23:52:05  ( -70.21,  -1.38)   33.67                71
 10/11/2023   00:41:31   (  69.86, 165.86) 10/11/2023   00:41:36  (  69.88, 165.80)    3.15                 5
 10/11/2023   01:32:13   ( -69.77, -26.68) 10/11/2023   01:31:06  ( -69.77, -26.71)    1.09                67
 10/13/2023   16:07:40   ( -69.95, 114.19) 10/13/2023   16:08:38  ( -69.98, 114.18)    2.95                58
 10/13/2023   16:58:24   (  69.84, -78.34) 10/13/2023   16:58:05  (  69.86, -78.33)    2.31                19
 10/13/2023   17:48:55   ( -69.17,  89.96) 10/13/2023   17:47:45  ( -69.21,  88.42)   60.94                70
 10/16/2023   08:24:33   ( -69.95,-130.02) 10/16/2023   08:25:07  ( -69.93,-130.00)    2.04                34
 10/16/2023   09:15:16   (  69.79,  37.52) 10/16/2023   09:14:34  (  69.81,  37.48)    3.05                42