Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 6 1.  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   06:44:11   (  70.82,  73.92) 06/02/2023   06:45:19  (  70.73,  75.75)   67.87                68
 06/02/2023   07:34:40   ( -70.06,-117.54) 06/02/2023   07:34:59  ( -70.06,-117.58)    1.66                19
 06/02/2023   08:25:25   (  69.99,  49.87) 06/02/2023   08:24:26  (  69.96,  49.92)    3.27                59
 06/04/2023   23:00:52   (  70.13,-169.20) 06/04/2023   23:01:57  (  70.13,-169.24)    1.57                65
 06/04/2023   23:51:34   ( -70.04,  -1.75) 06/04/2023   23:51:27  ( -70.02,  -1.77)    2.49                 7
 06/05/2023   00:42:11   (  69.55, 166.28) 06/05/2023   00:41:00  (  69.58, 165.27)   39.34                71
 06/07/2023   15:17:47   (  70.13, -53.43) 06/07/2023   15:18:25  (  70.12, -53.38)    1.79                38
 06/07/2023   16:08:28   ( -69.98, 114.11) 06/07/2023   16:07:55  ( -70.01, 114.10)    3.41                33
 06/10/2023   06:44:08   ( -70.76,-105.98) 06/10/2023   06:45:17  ( -70.69,-104.31)   61.63                69
 06/10/2023   07:34:41   (  70.07,  62.42) 06/10/2023   07:34:53  (  70.09,  62.45)    1.91                12
 06/10/2023   08:25:23   ( -69.98,-130.12) 06/10/2023   08:24:23  ( -69.98,-130.07)    2.17                60
 06/12/2023   23:00:51   ( -70.14,  10.78) 06/12/2023   23:01:54  ( -70.15,  10.77)    1.42                63
 06/12/2023   23:51:35   (  70.03, 178.25) 06/12/2023   23:51:21  (  70.03, 178.25)    0.39                14
 06/13/2023   00:42:08   ( -69.51, -13.66) 06/13/2023   00:40:57  ( -69.55, -14.79)   44.06                71