Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 4 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/16/2019   10:39:22   (   0.01,-137.21) (   0.24,-138.26)  119.80                80
 04/17/2019   10:17:59   (   0.01,-137.21) (  -0.80,-133.74)  395.81                80
 04/18/2019   22:39:56   (  -0.01,-137.18) (  -0.40,-139.04)  211.72                80
 04/19/2019   22:23:52   (  -0.00,-137.18) (   0.58,-134.51)  304.12                80
 04/21/2019   10:45:41   (   0.01,-137.19) (   0.56,-139.79)  295.18                80
 04/22/2019   10:24:16   (   0.02,-137.18) (  -0.42,-135.25)  220.07                80
 04/23/2019   22:46:14   (  -0.01,-137.14) (  -0.77,-140.56)  389.47                80
 04/24/2019   22:30:09   (  -0.01,-137.13) (   0.21,-136.03)  125.72                80
 04/26/2019   10:51:59   (   0.01,-137.15) (   0.93,-141.31)  474.02                80
 04/27/2019   10:30:34   (   0.01,-137.13) (  -0.05,-136.77)   40.53                80