Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 6 13.  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)
 06/15/2023   15:17:44   ( -70.12, 126.58) 06/15/2023   15:18:19  ( -70.12, 126.62)    1.38                35
 06/15/2023   16:08:28   (  70.00, -65.93) 06/15/2023   16:07:46  (  70.02, -65.89)    2.51                42
 06/18/2023   06:44:02   (  70.49,  74.45) 06/18/2023   06:45:12  (  70.39,  75.26)   32.40                70
 06/18/2023   07:34:38   ( -70.09,-117.60) 06/18/2023   07:34:46  ( -70.06,-117.58)    2.83                 8
 06/18/2023   08:25:22   (  69.97,  49.88) 06/18/2023   08:24:13  (  69.95,  49.91)    2.41                69
 06/20/2023   23:00:50   (  70.16,-169.25) 06/20/2023   23:01:42  (  70.15,-169.21)    2.09                52
 06/20/2023   23:51:31   ( -70.01,  -1.71) 06/20/2023   23:51:12  ( -70.04,  -1.73)    3.16                19
 06/21/2023   00:42:00   (  69.10, 166.91) 06/21/2023   00:40:53  (  69.15, 164.72)   87.24                67
 06/23/2023   15:17:42   (  70.09, -53.38) 06/23/2023   15:18:07  (  70.09, -53.40)    0.89                25
 06/23/2023   16:08:24   ( -69.99, 114.09) 06/23/2023   16:07:37  ( -69.99, 114.09)    0.26                47
 06/26/2023   06:43:53   ( -70.23,-105.14) 06/26/2023   06:45:05  ( -70.19,-105.01)    6.50                72
 06/26/2023   07:34:36   (  70.08,  62.41) 06/26/2023   07:34:32  (  70.07,  62.46)    2.18                 4
 06/26/2023   08:25:16   ( -69.87,-129.96) 06/26/2023   08:24:03  ( -69.91,-130.13)    8.04                73