Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 6 4.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 06/06/2023   07:09:19   (  70.08,  68.76) 06/06/2023   07:10:08  (  70.08,  68.77)    0.38                49
 06/06/2023   08:00:01   ( -69.99,-123.79) 06/06/2023   07:59:38  ( -69.97,-123.75)    3.11                23
 06/08/2023   23:26:12   (  70.02,-175.39) 06/08/2023   23:26:39  (  70.03,-175.42)    1.55                27
 06/09/2023   00:16:54   ( -69.94,  -7.94) 06/09/2023   00:16:09  ( -69.93,  -7.94)    1.19                45
 06/11/2023   14:52:28   ( -70.40, 132.48) 06/11/2023   14:53:40  ( -70.29, 133.18)   29.05                72
 06/11/2023   15:43:07   (  70.03, -59.63) 06/11/2023   15:43:10  (  70.02, -59.57)    2.72                 3
 06/11/2023   16:33:48   ( -69.88, 107.91) 06/11/2023   16:32:40  ( -69.91, 107.92)    3.27                68
 06/14/2023   07:09:17   ( -70.10,-111.27) 06/14/2023   07:10:14  ( -70.09,-111.23)    1.68                57
 06/14/2023   08:00:01   (  69.99,  56.20) 06/14/2023   07:59:41  (  69.98,  56.26)    2.30                20
 06/14/2023   08:50:31   ( -69.26,-135.41) 06/14/2023   08:49:22  ( -69.27,-137.07)   65.33                69
 06/16/2023   23:26:11   ( -70.05,   4.56) 06/16/2023   23:26:45  ( -70.03,   4.57)    2.43                34
 06/17/2023   00:16:54   (  69.90, 172.11) 06/17/2023   00:16:12  (  69.92, 172.06)    3.13                42