Simultaneous Nadir Overpasses (SNOs) between GOES-17 and LANDSAT-8
TLE Epoch: 2019 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)
 04/20/2019   07:04:05   (   0.00,-137.17) (   0.78,-133.53)  414.74                80
 04/20/2019   19:25:19   (  -0.00,-137.22) (   0.33,-138.68)  166.94                80
 04/22/2019   19:15:47   (   0.00,-137.21) (  -0.31,-135.73)  168.33                80
 04/23/2019   07:37:11   (  -0.01,-137.17) (  -0.80,-140.92)  426.66                80
 04/25/2019   07:24:58   (  -0.01,-137.15) (  -0.21,-137.95)   92.23                80
 04/27/2019   07:10:06   (  -0.01,-137.13) (   0.44,-135.00)  241.76                80
 04/27/2019   19:31:21   (   0.01,-137.16) (   0.67,-140.16)  341.35                80
 04/29/2019   19:19:09   (   0.02,-137.13) (   0.02,-137.20)    7.83                80
 05/01/2019   19:09:36   (   0.02,-137.11) (  -0.57,-134.24)  325.38                80
 05/02/2019   07:31:00   (  -0.02,-137.07) (  -0.53,-139.43)  269.25                80