Simultaneous Nadir Overpasses (SNOs) between GOES-17 and LANDSAT-8
TLE Epoch: 2021 4 19.  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   19:09:56   (   0.04,-137.20) (  -0.60,-134.25)  335.30                80
 04/21/2021   07:31:19   (  -0.04,-137.20) (  -0.51,-139.44)  255.43                80
 04/23/2021   07:16:27   (  -0.03,-137.19) (   0.14,-136.49)   80.20                80
 04/25/2021   07:04:15   (  -0.03,-137.18) (   0.74,-133.53)  415.30                80
 04/25/2021   19:25:29   (   0.03,-137.18) (   0.37,-138.68)  171.30                80
 04/27/2021   19:15:57   (   0.03,-137.16) (  -0.28,-135.73)  163.00                80
 04/28/2021   07:37:21   (  -0.03,-137.16) (  -0.82,-140.93)  428.13                80
 04/29/2021   19:03:44   (   0.03,-137.14) (  -0.88,-132.77)  496.28                80
 04/30/2021   07:25:08   (  -0.03,-137.13) (  -0.21,-137.96)   95.10                80
 05/02/2021   07:10:16   (  -0.02,-137.10) (   0.45,-135.02)  237.26                80
 05/02/2021   19:31:31   (   0.02,-137.09) (   0.66,-140.17)  350.23                80