Simultaneous Nadir Overpasses (SNOs) between GOES-15 and LANDSAT-8
TLE Epoch: 2021 6 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)
 06/18/2021   06:27:29   (   0.11,-128.43) (   1.00,-124.32)  467.28                80
 06/18/2021   18:48:44   (  -0.11,-128.41) (   0.14,-129.47)  120.96                80
 06/20/2021   18:39:13   (  -0.11,-128.38) (  -0.48,-126.51)  212.58                80
 06/21/2021   07:00:37   (   0.10,-128.40) (  -0.59,-131.71)  376.15                80
 06/23/2021   06:48:26   (   0.10,-128.36) (   0.03,-128.75)   43.79                80
 06/25/2021   06:33:36   (   0.11,-128.32) (   0.65,-125.79)  287.77                80
 06/25/2021   18:54:50   (  -0.11,-128.28) (   0.48,-130.94)  302.50                80
 06/27/2021   18:45:19   (  -0.11,-128.24) (  -0.14,-127.98)   29.06                80
 06/29/2021   18:33:09   (  -0.12,-128.19) (  -0.83,-125.03)  360.39                80
 06/30/2021   06:54:33   (   0.12,-128.22) (  -0.30,-130.22)  227.36                80