Simultaneous Nadir Overpasses (SNOs) between GOES-15 and LANDSAT-8
TLE Epoch: 2021 6 30.  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)
 06/30/2021   06:54:33   (   0.11,-128.25) (  -0.32,-130.21)  222.90                80
 07/02/2021   06:39:42   (   0.11,-128.21) (   0.31,-127.25)  108.60                80
 07/02/2021   19:00:57   (  -0.10,-128.18) (   0.82,-132.40)  480.92                80
 07/04/2021   06:27:31   (   0.12,-128.16) (   0.94,-124.29)  439.83                80
 07/04/2021   18:48:46   (  -0.11,-128.13) (   0.19,-129.44)  149.62                80
 07/06/2021   18:39:15   (  -0.11,-128.08) (  -0.45,-126.48)  181.05                80
 07/07/2021   07:00:38   (   0.10,-128.09) (  -0.68,-131.67)  407.50                80
 07/09/2021   06:48:27   (   0.10,-128.03) (  -0.04,-128.71)   77.89                80
 07/11/2021   06:33:37   (   0.11,-127.96) (   0.61,-125.76)  251.05                80
 07/11/2021   18:54:51   (  -0.10,-127.91) (   0.52,-130.91)  340.37                80
 07/13/2021   18:45:19   (  -0.11,-127.84) (  -0.06,-127.94)   11.96                80