Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 6 2.  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)
 06/02/2023   06:44:10   (  70.82,  73.93) 06/02/2023   06:45:18  (  70.73,  75.76)   67.73                68
 06/02/2023   07:34:39   ( -70.06,-117.54) 06/02/2023   07:34:58  ( -70.07,-117.58)    1.86                19
 06/02/2023   08:25:24   (  69.98,  49.88) 06/02/2023   08:24:25  (  69.96,  49.92)    2.74                59
 06/04/2023   23:00:52   (  70.13,-169.20) 06/04/2023   23:01:57  (  70.13,-169.25)    1.74                65
 06/04/2023   23:51:34   ( -70.04,  -1.75) 06/04/2023   23:51:27  ( -70.02,  -1.77)    2.75                 7
 06/05/2023   00:42:11   (  69.55, 166.29) 06/05/2023   00:41:00  (  69.58, 165.27)   39.51                71
 06/07/2023   15:17:47   (  70.13, -53.43) 06/07/2023   15:18:25  (  70.11, -53.39)    1.84                38
 06/07/2023   16:08:28   ( -69.98, 114.10) 06/07/2023   16:07:55  ( -70.01, 114.09)    2.45                33
 06/10/2023   06:44:08   ( -70.77,-105.98) 06/10/2023   06:45:17  ( -70.68,-104.34)   61.32                69
 06/10/2023   07:34:41   (  70.08,  62.41) 06/10/2023   07:34:53  (  70.07,  62.43)    0.68                12
 06/10/2023   08:25:23   ( -69.98,-130.13) 06/10/2023   08:24:23  ( -69.97,-130.09)    2.41                60
 06/12/2023   23:00:50   ( -70.14,  10.77) 06/12/2023   23:01:53  ( -70.12,  10.74)    2.50                63
 06/12/2023   23:51:34   (  70.03, 178.25) 06/12/2023   23:51:20  (  70.01, 178.22)    3.05                14
 06/13/2023   00:42:07   ( -69.46, -13.59) 06/13/2023   00:40:57  ( -69.52, -14.82)   48.28                70
 06/15/2023   15:17:44   ( -70.10, 126.60) 06/15/2023   15:18:20  ( -70.09, 126.58)    1.38                36
 06/15/2023   16:08:28   (  70.00, -65.93) 06/15/2023   16:07:47  (  69.98, -65.94)    2.62                41