Simultaneous Nadir Overpasses (SNOs) between GOES-17 and LANDSAT-8
TLE Epoch: 2021 10 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 10/09/2021   07:13:50   (   0.05,-137.21) (   0.53,-135.03)  248.46                80
 10/09/2021   19:32:25   (  -0.05,-137.21) (   0.55,-140.19)  338.27                80
 10/11/2021   19:20:15   (  -0.05,-137.19) (  -0.07,-137.23)    5.15                80
 10/13/2021   19:10:43   (  -0.04,-137.16) (  -0.63,-134.26)  329.54                80
 10/14/2021   07:32:07   (   0.04,-137.16) (  -0.43,-139.46)  261.53                80
 10/16/2021   07:17:16   (   0.03,-137.13) (   0.19,-136.50)   71.90                80
 10/18/2021   07:05:04   (   0.03,-137.10) (   0.77,-133.53)  405.08                80
 10/18/2021   19:26:20   (  -0.03,-137.09) (   0.31,-138.70)  182.09                80
 10/20/2021   19:16:49   (  -0.03,-137.06) (  -0.33,-135.74)  150.70                80
 10/21/2021   07:38:13   (   0.03,-137.05) (  -0.79,-140.93)  440.50                80
 10/22/2021   19:04:37   (  -0.03,-137.02) (  -0.91,-132.77)  482.84                80