Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 6 15.  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)
 06/18/2023   06:44:02   (  70.48,  74.47) 06/18/2023   06:45:13  (  70.36,  75.21)   30.66                71
 06/18/2023   07:34:38   ( -70.07,-117.58) 06/18/2023   07:34:46  ( -70.08,-117.56)    1.17                 8
 06/18/2023   08:25:22   (  69.96,  49.90) 06/18/2023   08:24:13  (  69.97,  49.94)    2.24                69
 06/20/2023   23:00:49   (  70.14,-169.23) 06/20/2023   23:01:41  (  70.17,-169.18)    3.26                52
 06/20/2023   23:51:31   ( -70.05,  -1.77) 06/20/2023   23:51:11  ( -70.06,  -1.70)    2.72                20
 06/21/2023   00:41:59   (  69.09, 166.93) 06/21/2023   00:40:52  (  69.17, 164.74)   87.23                67
 06/23/2023   15:17:43   (  70.13, -53.44) 06/23/2023   15:18:07  (  70.12, -53.36)    3.36                24
 06/23/2023   16:08:24   ( -69.98, 114.10) 06/23/2023   16:07:37  ( -70.01, 114.12)    3.20                47
 06/26/2023   06:43:53   ( -70.23,-105.13) 06/26/2023   06:45:05  ( -70.22,-104.98)    5.78                72
 06/26/2023   07:34:36   (  70.07,  62.42) 06/26/2023   07:34:33  (  70.04,  62.42)    3.03                 3
 06/26/2023   08:25:17   ( -69.92,-130.03) 06/26/2023   08:24:03  ( -69.94,-130.09)    3.33                74
 06/28/2023   23:00:45   ( -70.12,  10.81) 06/28/2023   23:01:31  ( -70.12,  10.78)    1.32                46
 06/28/2023   23:51:29   (  70.02, 178.27) 06/28/2023   23:50:58  (  70.00, 178.26)    1.65                31