Simultaneous Nadir Overpasses (SNOs) between GOES-15 and LANDSAT-8
TLE Epoch: 2021 6 18.  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)
 06/18/2021   06:27:28   (   0.11,-128.43) (   0.96,-124.31)  468.09                80
 06/18/2021   18:48:44   (  -0.10,-128.42) (   0.12,-129.47)  119.44                80
 06/20/2021   18:39:13   (  -0.11,-128.40) (  -0.49,-126.51)  214.66                80
 06/21/2021   07:00:38   (   0.10,-128.41) (  -0.57,-131.71)  374.38                80
 06/23/2021   06:48:27   (   0.10,-128.38) (   0.04,-128.75)   41.49                80
 06/25/2021   06:33:36   (   0.11,-128.34) (   0.66,-125.79)  290.69                80
 06/25/2021   18:54:50   (  -0.10,-128.31) (   0.47,-130.94)  298.91                80
 06/27/2021   18:45:20   (  -0.11,-128.27) (  -0.15,-127.98)   33.14                80
 06/29/2021   18:33:09   (  -0.12,-128.24) (  -0.78,-125.02)  365.13                80
 06/30/2021   06:54:33   (   0.11,-128.26) (  -0.28,-130.22)  222.89                80