Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 9 24.  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)
 09/24/2023   23:50:54   ( -70.01,  -1.69) 09/24/2023   23:52:02  ( -70.01,  -1.64)    1.69                68
 09/25/2023   00:41:38   (  69.89, 165.81) 09/25/2023   00:41:29  (  69.91, 165.86)    2.77                 9
 09/25/2023   01:32:15   ( -69.54, -26.36) 09/25/2023   01:31:02  ( -69.63, -26.89)   22.59                73
 09/27/2023   16:07:48   ( -69.97, 114.15) 09/27/2023   16:08:30  ( -69.95, 114.16)    2.19                42
 09/27/2023   16:58:32   (  69.84, -78.35) 09/27/2023   16:57:57  (  69.84, -78.35)    0.52                35
 09/30/2023   07:34:10   (  70.54,  61.71) 09/30/2023   07:35:19  (  70.45,  63.15)   54.36                69
 09/30/2023   08:24:42   ( -69.93,-130.02) 09/30/2023   08:24:57  ( -69.90,-130.01)    3.06                15
 09/30/2023   09:15:25   (  69.81,  37.47) 09/30/2023   09:14:23  (  69.79,  37.48)    2.28                62
 10/02/2023   23:50:53   (  69.99, 178.34) 10/02/2023   23:51:52  (  69.98, 178.37)    1.71                59
 10/03/2023   00:41:34   ( -69.85, -14.13) 10/03/2023   00:41:22  ( -69.88, -14.14)    3.05                12
 10/03/2023   01:32:08   (  69.20, 154.11) 10/03/2023   01:30:58  (  69.26, 152.67)   57.29                70
 10/05/2023   16:07:46   (  69.93, -65.79) 10/05/2023   16:08:18  (  69.92, -65.81)    1.22                32
 10/05/2023   16:58:28   ( -69.84, 101.66) 10/05/2023   16:57:48  ( -69.82, 101.68)    1.99                40