Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 6 5.  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)
 06/07/2023   15:17:46   (  70.09, -53.38) 06/07/2023   15:18:25  (  70.09, -53.42)    1.65                39
 06/07/2023   16:08:28   ( -70.01, 114.07) 06/07/2023   16:07:55  ( -69.98, 114.05)    3.32                33
 06/10/2023   06:44:08   ( -70.79,-106.02) 06/10/2023   06:45:17  ( -70.65,-104.37)   62.48                69
 06/10/2023   07:34:40   (  70.04,  62.46) 06/10/2023   07:34:53  (  70.05,  62.40)    2.65                13
 06/10/2023   08:25:22   ( -69.95,-130.08) 06/10/2023   08:24:23  ( -69.94,-130.12)    1.82                59
 06/12/2023   23:00:51   ( -70.17,  10.74) 06/12/2023   23:01:53  ( -70.16,  10.79)    1.91                62
 06/12/2023   23:51:35   (  70.05, 178.22) 06/12/2023   23:51:20  (  70.05, 178.27)    2.21                15
 06/13/2023   00:42:08   ( -69.48, -13.62) 06/13/2023   00:40:57  ( -69.56, -14.77)   45.38                71
 06/15/2023   15:17:45   ( -70.12, 126.57) 06/15/2023   15:18:20  ( -70.14, 126.63)    2.70                35
 06/15/2023   16:08:29   (  70.02, -65.96) 06/15/2023   16:07:47  (  70.02, -65.88)    2.86                42
 06/18/2023   06:44:02   (  70.51,  74.42) 06/18/2023   06:45:13  (  70.36,  75.20)   33.71                71
 06/18/2023   07:34:38   ( -70.09,-117.61) 06/18/2023   07:34:46  ( -70.09,-117.55)    2.29                 8
 06/18/2023   08:25:22   (  69.99,  49.86) 06/18/2023   08:24:13  (  69.97,  49.93)    3.37                69