Simultaneous Nadir Overpasses (SNOs) between GOES-17 and LANDSAT-8
TLE Epoch: 2021 9 20.  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   07:25:55   (   0.04,-137.21) (  -0.09,-137.97)   86.21                80
 09/23/2021   07:11:03   (   0.04,-137.21) (   0.48,-135.00)  250.34                80
 09/23/2021   19:32:18   (  -0.04,-137.21) (   0.59,-140.16)  336.09                80
 09/25/2021   19:22:48   (  -0.04,-137.20) (  -0.05,-137.21)    1.72                80
 09/27/2021   19:10:36   (  -0.03,-137.19) (  -0.63,-134.24)  334.55                80
 09/28/2021   07:32:00   (   0.03,-137.18) (  -0.42,-139.44)  256.11                80
 09/30/2021   07:17:08   (   0.03,-137.16) (   0.17,-136.47)   77.95                80
 10/02/2021   07:04:58   (   0.02,-137.13) (   0.82,-133.52)  411.44                80
 10/02/2021   19:26:12   (  -0.02,-137.12) (   0.32,-138.67)  175.87                80