Simultaneous Nadir Overpasses (SNOs) between GOES-17 and LANDSAT-8
TLE Epoch: 2021 5 18.  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)
 05/18/2021   07:10:21   (  -0.04,-137.20) (   0.40,-135.01)  248.24                80
 05/18/2021   19:31:36   (   0.03,-137.20) (   0.69,-140.17)  338.17                80
 05/20/2021   19:19:26   (   0.03,-137.20) (   0.06,-137.22)    3.50                80
 05/22/2021   19:09:56   (   0.03,-137.19) (  -0.58,-134.26)  332.69                80
 05/23/2021   07:28:41   (  -0.03,-137.19) (  -0.50,-139.46)  258.00                80
 05/25/2021   07:19:11   (  -0.03,-137.17) (   0.14,-136.51)   76.29                80
 05/27/2021   07:04:20   (  -0.02,-137.15) (   0.73,-133.54)  409.43                80
 05/27/2021   19:25:36   (   0.02,-137.14) (   0.37,-138.70)  177.89                80
 05/29/2021   19:16:06   (   0.01,-137.10) (  -0.28,-135.75)  154.41                80
 05/30/2021   07:37:30   (  -0.01,-137.10) (  -0.85,-140.93)  436.78                80
 05/31/2021   19:03:56   (   0.00,-137.07) (  -0.93,-132.79)  486.48                80