Simultaneous Nadir Overpasses (SNOs) between GOES-17 and LANDSAT-8
TLE Epoch: 2020 12 25.  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)
 12/25/2020   07:11:04   (   0.02,-137.21) (   0.48,-135.01)  250.44                80
 12/25/2020   19:34:59   (  -0.01,-137.21) (   0.58,-140.17)  335.61                80
 12/27/2020   19:20:07   (  -0.02,-137.19) (  -0.04,-137.21)    2.40                80
 12/29/2020   19:10:36   (  -0.02,-137.17) (  -0.66,-134.25)  332.30                80
 12/30/2020   07:31:59   (   0.02,-137.16) (  -0.45,-139.44)  259.27                80
 01/01/2021   07:17:07   (   0.02,-137.12) (   0.18,-136.48)   73.47                80
 01/03/2021   07:04:54   (   0.02,-137.08) (   0.75,-133.51)  405.62                80
 01/03/2021   19:26:10   (  -0.02,-137.08) (   0.31,-138.67)  181.49                80
 01/05/2021   19:16:38   (  -0.02,-137.03) (  -0.32,-135.72)  150.16                80
 01/06/2021   07:38:01   (   0.01,-137.02) (  -0.83,-140.90)  441.70                80
 01/07/2021   19:04:25   (  -0.01,-136.98) (  -0.90,-132.75)  481.13                80