Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 11 29.  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)
 11/30/2023   15:18:01   (  70.72, -54.57) 11/30/2023   15:19:08  (  70.63, -52.54)   75.42                67
 11/30/2023   16:08:29   ( -69.89, 114.05) 11/30/2023   16:08:49  ( -69.91, 114.05)    2.56                20
 11/30/2023   16:59:13   (  69.77, -78.47) 11/30/2023   16:58:17  (  69.75, -78.53)    3.36                56
 12/03/2023   07:34:43   (  69.95,  62.41) 12/03/2023   07:35:48  (  69.96,  62.38)    1.97                65
 12/03/2023   08:25:25   ( -69.85,-130.13) 12/03/2023   08:25:18  ( -69.85,-130.14)    0.72                 7
 12/03/2023   09:16:02   (  69.37,  37.88) 12/03/2023   09:14:51  (  69.41,  36.90)   38.68                71
 12/05/2023   23:51:39   (  69.93, 178.20) 12/05/2023   23:52:16  (  69.91, 178.19)    1.79                37
 12/06/2023   00:42:21   ( -69.83, -14.33) 12/06/2023   00:41:46  ( -69.80, -14.32)    2.53                35
 12/08/2023   15:17:58   ( -70.44, 125.86) 12/08/2023   15:19:08  ( -70.37, 127.09)   46.68                70
 12/08/2023   16:08:33   (  69.87, -65.94) 12/08/2023   16:08:42  (  69.87, -65.97)    1.26                 9
 12/08/2023   16:59:15   ( -69.77, 101.53) 12/08/2023   16:58:12  ( -69.76, 101.51)    0.70                63
 12/11/2023   07:34:45   ( -69.98,-117.64) 12/11/2023   07:35:41  ( -69.95,-117.61)    3.23                56
 12/11/2023   08:25:28   (  69.82,  49.90) 12/11/2023   08:25:08  (  69.84,  49.88)    1.55                20