Simultaneous Nadir Overpasses (SNOs) between GOES-15 and LANDSAT-8
TLE Epoch: 2021 7 17.  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)
 07/18/2021   06:39:42   (   0.09,-127.69) (   0.18,-127.21)   55.12                80
 07/20/2021   06:27:32   (   0.09,-127.61) (   0.82,-124.25)  381.74                80
 07/20/2021   18:48:47   (  -0.07,-127.55) (   0.32,-129.40)  210.74                80
 07/22/2021   18:39:17   (  -0.08,-127.46) (  -0.31,-126.45)  115.15                80
 07/23/2021   07:00:41   (   0.06,-127.48) (  -0.83,-131.63)  472.58                80
 07/24/2021   18:27:06   (  -0.09,-127.36) (  -0.89,-123.48)  440.69                80
 07/25/2021   06:48:31   (   0.07,-127.38) (  -0.19,-128.68)  147.17                80
 07/27/2021   06:33:40   (   0.08,-127.29) (   0.39,-125.71)  178.28                80
 07/27/2021   18:57:36   (  -0.06,-127.21) (   0.69,-130.87)  415.56                80
 07/29/2021   18:45:25   (  -0.06,-127.12) (   0.11,-127.91)   89.94                80