Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 4 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/13/2019   22:33:38   (   0.00,-137.19) (  -0.05,-137.52)   37.27                80
 04/14/2019   22:17:33   (   0.00,-137.19) (   0.93,-132.99)  478.60                80
 04/16/2019   10:39:23   (  -0.00,-137.20) (   0.21,-138.27)  121.15                80
 04/17/2019   10:17:58   (  -0.00,-137.19) (  -0.77,-133.73)  394.02                80
 04/18/2019   22:39:56   (   0.00,-137.16) (  -0.43,-139.04)  214.54                80
 04/19/2019   22:23:52   (   0.00,-137.15) (   0.61,-134.52)  300.77                80
 04/21/2019   10:45:40   (  -0.01,-137.16) (   0.60,-139.78)  299.19                80
 04/22/2019   10:24:17   (  -0.01,-137.15) (  -0.45,-135.26)  215.27                80
 04/23/2019   22:46:14   (   0.01,-137.10) (  -0.75,-140.57)  395.14                80
 04/24/2019   22:30:10   (   0.02,-137.08) (   0.24,-136.03)  119.45                80