Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 2 17.  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)
 02/19/2023   14:53:19   ( -70.15, 132.88) 02/19/2023   14:54:27  ( -70.15, 132.88)    0.35                68
 02/19/2023   15:44:03   (  70.04, -59.63) 02/19/2023   15:43:54  (  70.05, -59.62)    1.24                 9
 02/19/2023   16:34:40   ( -69.68, 108.21) 02/19/2023   16:33:28  ( -69.71, 107.54)   26.13                72
 02/22/2023   07:10:14   ( -70.13,-111.32) 02/22/2023   07:10:52  ( -70.14,-111.25)    2.92                38
 02/22/2023   08:00:57   (  69.97,  56.24) 02/22/2023   08:00:20  (  69.98,  56.17)    3.07                37
 02/24/2023   22:36:32   (  70.48,-163.42) 02/24/2023   22:37:43  (  70.41,-162.59)   31.98                71
 02/24/2023   23:27:08   ( -70.07,   4.54) 02/24/2023   23:27:17  ( -70.08,   4.56)    0.94                 9
 02/25/2023   00:17:52   (  69.96, 172.01) 02/25/2023   00:16:44  (  69.97, 172.05)    1.56                68
 02/27/2023   14:53:20   (  70.13, -47.10) 02/27/2023   14:54:11  (  70.12, -47.10)    0.33                51
 02/27/2023   15:44:02   ( -70.03, 120.37) 02/27/2023   15:43:41  ( -70.01, 120.37)    1.76                21
 02/27/2023   16:34:29   (  69.02, -70.86) 02/27/2023   16:33:23  (  69.07, -73.25)   95.19                66
 03/02/2023   06:19:45   ( -71.04,-100.11) 03/02/2023   06:20:52  ( -70.94, -97.63)   90.54                67
 03/02/2023   07:10:12   (  70.05,  68.78) 03/02/2023   07:10:33  (  70.06,  68.71)    3.01                21
 03/02/2023   08:00:54   ( -69.95,-123.74) 03/02/2023   08:00:03  ( -69.95,-123.81)    2.62                51