Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 4 12.  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   22:33:37   (  -0.00,-137.19) (  -0.08,-137.52)   37.43                80
 04/14/2019   22:17:34   (   0.00,-137.19) (   0.96,-132.99)  478.27                80
 04/16/2019   10:39:22   (  -0.00,-137.20) (   0.24,-138.26)  121.71                80
 04/17/2019   10:17:59   (  -0.00,-137.19) (  -0.80,-133.74)  393.36                80
 04/18/2019   22:39:56   (   0.00,-137.15) (  -0.40,-139.04)  215.33                80
 04/19/2019   22:23:52   (  -0.00,-137.14) (   0.58,-134.51)  299.96                80
 04/21/2019   10:45:41   (   0.00,-137.15) (   0.56,-139.79)  300.09                80
 04/22/2019   10:24:16   (   0.00,-137.14) (  -0.42,-135.26)  214.35                80
 04/23/2019   22:46:14   (  -0.00,-137.08) (  -0.77,-140.56)  396.15                80
 04/24/2019   22:30:09   (  -0.00,-137.07) (   0.21,-136.03)  118.39                80
 04/26/2019   10:51:59   (   0.00,-137.07) (   0.93,-141.31)  482.00                80