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   18:48:43   (  -0.10,-128.42) (   0.14,-129.47)  119.32                80
 06/20/2021   18:39:14   (  -0.10,-128.40) (  -0.54,-126.52)  214.93                80
 06/21/2021   07:00:37   (   0.10,-128.41) (  -0.59,-131.71)  374.24                80
 06/23/2021   06:48:26   (   0.10,-128.38) (   0.03,-128.75)   41.20                80
 06/25/2021   06:33:35   (   0.11,-128.35) (   0.65,-125.79)  291.02                80
 06/25/2021   18:54:51   (  -0.10,-128.32) (   0.43,-130.95)  298.41                80
 06/27/2021   18:45:20   (  -0.11,-128.28) (  -0.19,-127.99)   33.76                80
 06/29/2021   18:33:09   (  -0.12,-128.24) (  -0.82,-125.03)  365.86                80
 06/30/2021   06:54:33   (   0.11,-128.26) (  -0.30,-130.22)  222.27                80
 07/02/2021   06:39:42   (   0.12,-128.22) (   0.33,-127.26)  109.67                80