Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2018 9 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/19/2018   18:33:20   (   0.01, -75.22) (  -0.46, -77.20)  226.55                80
 09/20/2018   18:17:16   (   0.01, -75.23) (   0.60, -72.68)  290.78                80
 09/22/2018   06:39:05   (  -0.01, -75.25) (   0.60, -77.94)  307.02                80
 09/23/2018   06:17:40   (  -0.01, -75.27) (  -0.40, -73.41)  210.71                80
 09/24/2018   18:39:37   (   0.01, -75.28) (  -0.76, -78.72)  392.48                80
 09/25/2018   18:23:33   (   0.01, -75.29) (   0.24, -74.19)  125.64                80
 09/27/2018   06:45:22   (  -0.01, -75.33) (   0.90, -79.47)  471.09                80
 09/28/2018   06:23:58   (  -0.01, -75.35) (  -0.10, -74.93)   47.13                80
 09/30/2018   18:27:11   (   0.02, -75.38) (  -0.05, -75.71)   37.32                80
 10/01/2018   18:11:06   (   0.02, -75.40) (   0.95, -71.18)  480.95                80