Simultaneous Nadir Overpasses (SNOs) between GOES-15 and LANDSAT-8
TLE Epoch: 2021 4 20.  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)
 04/20/2021   06:48:09   (  -0.07,-127.82) (  -0.25,-128.68)   98.51                80
 04/22/2021   06:33:16   (  -0.07,-127.74) (   0.34,-125.72)  229.52                80
 04/22/2021   18:54:31   (   0.06,-127.79) (   0.71,-130.89)  351.59                80
 04/24/2021   18:42:18   (   0.06,-127.72) (   0.12,-127.92)   23.76                80
 04/26/2021   18:32:45   (   0.06,-127.63) (  -0.48,-124.96)  303.56                80
 04/27/2021   06:54:09   (  -0.06,-127.55) (  -0.62,-130.15)  296.43                80
 04/29/2021   06:39:16   (  -0.06,-127.45) (  -0.02,-127.19)   29.82                80
 05/01/2021   06:27:03   (  -0.06,-127.36) (   0.59,-124.23)  355.27                80
 05/01/2021   18:48:19   (   0.05,-127.39) (   0.46,-129.39)  227.66                80
 05/03/2021   18:38:46   (   0.04,-127.29) (  -0.14,-126.43)   97.58                80