Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 7 2.  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)
 07/02/2023   23:26:03   ( -70.07,   4.56) 07/02/2023   23:26:53  ( -70.08,   4.63)    2.93                50
 07/03/2023   00:16:46   (  69.90, 172.11) 07/03/2023   00:16:21  (  69.92, 172.05)    3.42                25
 07/03/2023   01:07:12   ( -68.96, -19.22) 07/03/2023   01:06:05  ( -69.04, -21.50)   91.23                67
 07/05/2023   15:42:56   ( -70.03, 120.38) 07/05/2023   15:43:25  ( -70.01, 120.41)    2.23                29
 07/05/2023   16:33:40   (  69.92, -72.15) 07/05/2023   16:32:52  (  69.91, -72.09)    2.63                48
 07/08/2023   07:09:12   (  70.37,  68.32) 07/08/2023   07:10:23  (  70.26,  69.01)   28.38                71
 07/08/2023   07:59:49   ( -70.00,-123.80) 07/08/2023   07:59:56  ( -69.99,-123.74)    2.66                 7
 07/08/2023   08:50:32   (  69.84,  43.75) 07/08/2023   08:49:24  (  69.83,  43.67)    3.50                68
 07/10/2023   23:25:59   (  70.03,-175.38) 07/10/2023   23:26:57  (  70.05,-175.42)    2.22                58
 07/11/2023   00:16:41   ( -69.93,  -7.91) 07/11/2023   00:16:27  ( -69.94,  -7.93)    1.86                14
 07/11/2023   01:07:13   (  69.19, 160.47) 07/11/2023   01:06:04  (  69.28, 158.81)   66.08                69
 07/13/2023   15:42:51   (  70.01, -59.59) 07/13/2023   15:43:26  (  70.03, -59.55)    2.44                35
 07/13/2023   16:33:33   ( -69.91, 107.89) 07/13/2023   16:32:56  ( -69.93, 107.94)    3.18                37