Simultaneous Nadir Overpasses (SNOs) between GOES-17 and LANDSAT-8
TLE Epoch: 2021 9 21.  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)
 09/21/2021   07:25:54   (   0.04,-137.20) (  -0.13,-137.96)   86.35                80
 09/23/2021   07:11:03   (   0.04,-137.20) (   0.51,-135.01)  249.95                80
 09/23/2021   19:32:19   (  -0.04,-137.20) (   0.57,-140.17)  336.38                80
 09/25/2021   19:20:07   (  -0.04,-137.20) (  -0.01,-137.20)    2.59                80
 09/27/2021   19:10:36   (  -0.03,-137.18) (  -0.66,-134.24)  333.91                80
 09/28/2021   07:32:00   (   0.03,-137.17) (  -0.46,-139.43)  256.93                80
 09/30/2021   07:17:09   (   0.03,-137.15) (   0.19,-136.48)   76.98                80
 10/02/2021   07:04:57   (   0.02,-137.12) (   0.78,-133.51)  410.25                80
 10/02/2021   19:26:13   (  -0.02,-137.11) (   0.29,-138.67)  176.94                80
 10/04/2021   19:16:41   (  -0.01,-137.08) (  -0.30,-135.71)  155.76                80