Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 6 9.  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)
 06/10/2023   06:44:08   ( -70.77,-105.99) 06/10/2023   06:45:17  ( -70.66,-104.35)   61.44                69
 06/10/2023   07:34:41   (  70.07,  62.42) 06/10/2023   07:34:53  (  70.07,  62.43)    0.40                12
 06/10/2023   08:25:22   ( -69.94,-130.06) 06/10/2023   08:24:23  ( -69.95,-130.10)    2.56                59
 06/12/2023   23:00:50   ( -70.15,  10.76) 06/12/2023   23:01:52  ( -70.16,  10.79)    1.77                62
 06/12/2023   23:51:34   (  70.03, 178.25) 06/12/2023   23:51:19  (  70.06, 178.29)    3.09                15
 06/13/2023   00:42:07   ( -69.47, -13.60) 06/13/2023   00:40:56  ( -69.56, -14.76)   46.37                71
 06/15/2023   15:17:44   ( -70.11, 126.59) 06/15/2023   15:18:19  ( -70.13, 126.63)    2.28                35
 06/15/2023   16:08:28   (  70.00, -65.93) 06/15/2023   16:07:46  (  70.02, -65.88)    2.87                42
 06/18/2023   06:44:02   (  70.49,  74.45) 06/18/2023   06:45:13  (  70.34,  75.19)   32.39                71
 06/18/2023   07:34:38   ( -70.08,-117.59) 06/18/2023   07:34:46  ( -70.07,-117.57)    1.58                 8
 06/18/2023   08:25:22   (  69.97,  49.88) 06/18/2023   08:24:13  (  69.96,  49.92)    2.22                69
 06/20/2023   23:00:50   (  70.16,-169.26) 06/20/2023   23:01:42  (  70.15,-169.21)    2.24                52
 06/20/2023   23:51:32   ( -70.06,  -1.79) 06/20/2023   23:51:12  ( -70.04,  -1.72)    3.01                20
 06/21/2023   00:42:00   (  69.10, 166.91) 06/21/2023   00:40:53  (  69.15, 164.72)   87.03                67
 06/23/2023   15:17:42   (  70.09, -53.39) 06/23/2023   15:18:07  (  70.09, -53.40)    0.43                25
 06/23/2023   16:08:24   ( -69.99, 114.09) 06/23/2023   16:07:37  ( -69.99, 114.09)    0.24                47