Simultaneous Nadir Overpasses (SNOs) between GOES-15 and LANDSAT-8
TLE Epoch: 2021 6 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 06/25/2021   06:33:36   (   0.11,-128.35) (   0.65,-125.79)  290.97                80
 06/25/2021   18:54:50   (  -0.10,-128.33) (   0.48,-130.94)  297.37                80
 06/27/2021   18:45:19   (  -0.11,-128.29) (  -0.14,-127.98)   34.99                80
 06/29/2021   18:33:09   (  -0.12,-128.25) (  -0.83,-125.03)  367.15                80
 06/30/2021   06:54:33   (   0.11,-128.26) (  -0.29,-130.22)  221.96                80
 07/02/2021   06:39:42   (   0.12,-128.22) (   0.34,-127.26)  110.10                80
 07/02/2021   19:00:57   (  -0.11,-128.19) (   0.79,-132.41)  479.80                80
 07/04/2021   06:27:31   (   0.12,-128.18) (   0.97,-124.30)  441.89                80
 07/04/2021   18:48:46   (  -0.11,-128.15) (   0.16,-129.45)  147.93                80
 07/06/2021   18:39:15   (  -0.11,-128.10) (  -0.47,-126.49)  183.32                80
 07/07/2021   07:00:39   (   0.10,-128.12) (  -0.65,-131.68)  404.56                80