Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 6 16.  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)
 06/16/2023   23:26:10   ( -70.04,   4.59) 06/16/2023   23:26:44  ( -70.05,   4.60)    1.62                34
 06/17/2023   00:16:54   (  69.92, 172.07) 06/17/2023   00:16:12  (  69.90, 172.03)    2.97                42
 06/19/2023   14:52:29   (  70.47, -47.63) 06/19/2023   14:53:40  (  70.36, -46.71)   36.81                71
 06/19/2023   15:43:04   ( -70.01, 120.40) 06/19/2023   15:43:14  ( -70.02, 120.44)    2.18                10
 06/19/2023   16:33:48   (  69.90, -72.12) 06/19/2023   16:32:41  (  69.92, -72.06)    3.56                67
 06/22/2023   07:09:15   (  70.09,  68.74) 06/22/2023   07:10:13  (  70.08,  68.78)    1.65                58
 06/22/2023   07:59:57   ( -69.99,-123.80) 06/22/2023   07:59:43  ( -69.97,-123.74)    3.14                14
 06/22/2023   08:50:29   (  69.24,  44.60) 06/22/2023   08:49:20  (  69.31,  43.00)   63.29                69
 06/24/2023   23:26:08   (  70.02,-175.40) 06/24/2023   23:26:43  (  70.00,-175.44)    2.92                35
 06/25/2023   00:16:50   ( -69.93,  -7.93) 06/25/2023   00:16:13  ( -69.90,  -7.96)    3.33                37
 06/27/2023   14:52:27   ( -70.59, 132.18) 06/27/2023   14:53:37  ( -70.51, 133.53)   51.10                70
 06/27/2023   15:43:02   (  70.02, -59.62) 06/27/2023   15:43:11  (  70.02, -59.54)    3.04                 9
 06/27/2023   16:33:43   ( -69.87, 107.93) 06/27/2023   16:32:42  ( -69.86, 107.87)    2.65                61