Simultaneous Nadir Overpasses (SNOs) between GOES-17 and LANDSAT-8
TLE Epoch: 2021 1 2.  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)
 01/03/2021   07:04:55   (   0.01,-137.21) (   0.80,-133.52)  419.11                80
 01/03/2021   19:28:50   (   0.00,-137.21) (   0.32,-138.67)  166.29                80
 01/05/2021   19:13:58   (   0.00,-137.20) (  -0.31,-135.72)  168.68                80
 01/06/2021   07:38:02   (  -0.01,-137.18) (  -0.79,-140.91)  423.05                80
 01/08/2021   07:25:50   (   0.01,-137.16) (  -0.15,-137.95)   89.33                80
 01/10/2021   07:10:58   (   0.02,-137.13) (   0.49,-134.99)  243.58                80
 01/10/2021   19:32:13   (  -0.02,-137.13) (   0.62,-140.15)  342.74                80
 01/12/2021   19:20:00   (  -0.01,-137.09) (   0.04,-137.18)   10.64                80
 01/14/2021   19:10:28   (  -0.01,-137.05) (  -0.61,-134.22)  321.99                80
 01/15/2021   07:31:51   (   0.01,-137.03) (  -0.48,-139.41)  270.26                80