Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 4 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/19/2019   22:23:52   (   0.00,-137.19) (   0.62,-134.52)  305.37                80
 04/21/2019   10:45:41   (  -0.00,-137.21) (   0.58,-139.79)  294.11                80
 04/22/2019   10:24:16   (  -0.00,-137.20) (  -0.41,-135.25)  221.29                80
 04/23/2019   22:46:14   (  -0.00,-137.17) (  -0.73,-140.57)  386.77                80
 04/24/2019   22:30:10   (  -0.00,-137.16) (   0.25,-136.03)  128.82                80
 04/26/2019   10:51:58   (   0.01,-137.17) (   0.95,-141.30)  470.64                80
 04/27/2019   10:30:35   (   0.02,-137.16) (  -0.09,-136.78)   44.32                80
 04/29/2019   22:33:48   (  -0.02,-137.11) (  -0.11,-137.55)   50.30                80
 04/30/2019   22:17:43   (  -0.02,-137.10) (   0.88,-133.02)  464.63                80
 05/02/2019   10:39:32   (   0.03,-137.10) (   0.27,-138.30)  135.75                80