Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 10 31.  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)
 11/01/2023   07:34:21   (  70.54,  61.63) 11/01/2023   07:35:30  (  70.45,  63.11)   55.82                69
 11/01/2023   08:24:52   ( -69.87,-130.01) 11/01/2023   08:25:08  ( -69.89,-130.06)    3.05                16
 11/01/2023   09:15:37   (  69.80,  37.40) 11/01/2023   09:14:35  (  69.79,  37.44)    2.48                62
 11/03/2023   23:51:09   (  69.95, 178.31) 11/03/2023   23:52:05  (  69.94, 178.27)    1.76                56
 11/04/2023   00:41:51   ( -69.85, -14.22) 11/04/2023   00:41:35  ( -69.82, -14.26)    2.95                16
 11/04/2023   01:32:22   (  69.04, 154.24) 11/04/2023   01:31:14  (  69.05, 152.36)   74.85                68
 11/06/2023   16:08:07   (  69.89, -65.85) 11/06/2023   16:08:31  (  69.89, -65.90)    2.05                24
 11/06/2023   16:58:49   ( -69.79, 101.62) 11/06/2023   16:58:01  ( -69.77, 101.58)    2.17                48
 11/09/2023   07:34:21   ( -69.95,-117.50) 11/09/2023   07:35:29  ( -69.96,-117.54)    2.28                68
 11/09/2023   08:25:05   (  69.84,  49.97) 11/09/2023   08:24:56  (  69.85,  49.95)    1.22                 9
 11/09/2023   09:15:42   ( -69.47,-142.17) 11/09/2023   09:14:30  ( -69.52,-142.87)   27.65                72
 11/11/2023   23:51:18   ( -69.91,  -1.69) 11/11/2023   23:51:53  ( -69.90,  -1.73)    2.73                35
 11/12/2023   00:42:02   (  69.81, 165.78) 11/12/2023   00:41:19  (  69.84, 165.83)    3.32                43