Simultaneous Nadir Overpasses (SNOs) between GOES-17 and LANDSAT-8
TLE Epoch: 2021 4 20.  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)
 04/20/2021   19:09:55   (   0.04,-137.20) (  -0.58,-134.25)  335.74                80
 04/21/2021   07:31:19   (  -0.04,-137.20) (  -0.53,-139.44)  254.95                80
 04/23/2021   07:16:27   (  -0.03,-137.20) (   0.12,-136.49)   80.99                80
 04/25/2021   07:04:14   (  -0.03,-137.19) (   0.72,-133.52)  416.51                80
 04/25/2021   19:25:30   (   0.03,-137.19) (   0.33,-138.69)  169.95                80
 04/27/2021   19:15:57   (   0.03,-137.18) (  -0.26,-135.73)  164.70                80
 04/28/2021   07:37:21   (  -0.03,-137.17) (  -0.83,-140.92)  426.39                80
 04/29/2021   19:03:45   (   0.03,-137.16) (  -0.93,-132.78)  498.33                80
 04/30/2021   07:25:09   (  -0.03,-137.15) (  -0.17,-137.97)   93.06                80
 05/02/2021   07:10:16   (  -0.02,-137.12) (   0.44,-135.01)  239.70                80
 05/02/2021   19:31:31   (   0.02,-137.11) (   0.68,-140.17)  347.62                80