Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 10 27.  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)
 10/29/2023   16:07:54   ( -69.93, 114.15) 10/29/2023   16:08:41  ( -69.94, 114.12)    1.80                47
 10/29/2023   16:58:38   (  69.81, -78.36) 10/29/2023   16:58:08  (  69.84, -78.38)    3.08                30
 11/01/2023   07:34:22   (  70.57,  61.59) 11/01/2023   07:35:31  (  70.42,  63.06)   57.55                69
 11/01/2023   08:24:53   ( -69.89,-130.04) 11/01/2023   08:25:08  ( -69.92,-130.02)    3.16                15
 11/01/2023   09:15:37   (  69.78,  37.44) 11/01/2023   09:14:36  (  69.76,  37.40)    2.71                61
 11/03/2023   23:51:10   (  69.97, 178.28) 11/03/2023   23:52:05  (  69.97, 178.32)    1.73                55
 11/04/2023   00:41:52   ( -69.87, -14.25) 11/04/2023   00:41:35  ( -69.86, -14.20)    2.11                17
 11/04/2023   01:32:22   (  69.01, 154.28) 11/04/2023   01:31:14  (  69.09, 152.41)   75.11                68
 11/06/2023   16:08:07   (  69.90, -65.87) 11/06/2023   16:08:31  (  69.88, -65.91)    3.10                24
 11/06/2023   16:58:49   ( -69.80, 101.60) 11/06/2023   16:58:01  ( -69.77, 101.57)    3.14                48
 11/09/2023   07:34:21   ( -69.95,-117.50) 11/09/2023   07:35:29  ( -69.98,-117.52)    3.11                68
 11/09/2023   08:25:05   (  69.85,  49.96) 11/09/2023   08:24:56  (  69.86,  49.97)    1.50                 9
 11/09/2023   09:15:42   ( -69.48,-142.17) 11/09/2023   09:14:30  ( -69.54,-142.85)   27.16                72