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)
 04/14/2019   22:17:34   (  -0.00,-137.19) (   0.96,-132.99)  479.09                80
 04/16/2019   10:39:22   (  -0.00,-137.21) (   0.24,-138.26)  120.23                80
 04/17/2019   10:17:59   (   0.00,-137.20) (  -0.80,-133.74)  395.34                80
 04/18/2019   22:39:56   (  -0.00,-137.18) (  -0.40,-139.05)  212.49                80
 04/19/2019   22:23:52   (  -0.00,-137.17) (   0.58,-134.51)  303.28                80
 04/21/2019   10:45:41   (   0.00,-137.19) (   0.56,-139.79)  296.13                80
 04/22/2019   10:24:16   (  -0.00,-137.18) (  -0.42,-135.26)  218.79                80
 04/23/2019   22:46:14   (   0.00,-137.13) (  -0.77,-140.56)  390.85                80
 04/24/2019   22:30:10   (   0.00,-137.12) (   0.27,-136.04)  124.21                80
 04/26/2019   10:51:59   (   0.01,-137.13) (   0.93,-141.31)  475.36                80
 04/27/2019   10:30:34   (   0.01,-137.12) (  -0.05,-136.77)   39.09                80