Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 6 3.  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)
 06/04/2023   23:00:52   (  70.12,-169.19) 06/04/2023   23:01:57  (  70.14,-169.24)    2.51                65
 06/04/2023   23:51:34   ( -70.04,  -1.75) 06/04/2023   23:51:27  ( -70.02,  -1.76)    1.75                 7
 06/05/2023   00:42:11   (  69.54, 166.29) 06/05/2023   00:41:00  (  69.59, 165.28)   39.70                71
 06/07/2023   15:17:47   (  70.12, -53.42) 06/07/2023   15:18:25  (  70.12, -53.39)    1.23                38
 06/07/2023   16:08:28   ( -69.98, 114.11) 06/07/2023   16:07:55  ( -70.01, 114.09)    3.21                33
 06/10/2023   06:44:08   ( -70.76,-105.98) 06/10/2023   06:45:17  ( -70.67,-104.34)   60.93                69
 06/10/2023   07:34:41   (  70.07,  62.42) 06/10/2023   07:34:53  (  70.07,  62.43)    0.24                12
 06/10/2023   08:25:23   ( -69.98,-130.12) 06/10/2023   08:24:23  ( -69.97,-130.09)    2.00                60
 06/12/2023   23:00:50   ( -70.14,  10.78) 06/12/2023   23:01:53  ( -70.12,  10.73)    3.17                63
 06/12/2023   23:51:34   (  70.03, 178.25) 06/12/2023   23:51:19  (  70.06, 178.29)    3.33                15
 06/13/2023   00:42:07   ( -69.46, -13.59) 06/13/2023   00:40:57  ( -69.51, -14.83)   48.82                70
 06/15/2023   15:17:44   ( -70.10, 126.61) 06/15/2023   15:18:20  ( -70.08, 126.56)    2.88                36
 06/15/2023   16:08:28   (  70.00, -65.92) 06/15/2023   16:07:46  (  70.02, -65.88)    2.95                42