Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 4 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/26/2019   10:51:59   (  -0.00,-137.21) (   0.89,-141.31)  467.31                80
 04/27/2019   10:30:35   (  -0.00,-137.21) (  -0.09,-136.78)   48.59                80
 04/29/2019   22:33:49   (   0.00,-137.19) (  -0.06,-137.56)   41.97                80
 04/30/2019   22:17:44   (   0.00,-137.19) (   0.93,-133.03)  474.12                80
 05/02/2019   10:39:32   (  -0.00,-137.20) (   0.27,-138.29)  125.85                80
 05/03/2019   10:18:09   (  -0.01,-137.19) (  -0.78,-133.77)  389.32                80
 05/04/2019   22:40:06   (   0.01,-137.16) (  -0.41,-139.08)  219.02                80
 05/05/2019   22:24:02   (   0.02,-137.15) (   0.58,-134.55)  295.99                80
 05/07/2019   10:45:51   (  -0.02,-137.15) (   0.56,-139.83)  304.98                80
 05/08/2019   10:24:27   (  -0.02,-137.13) (  -0.43,-135.29)  209.12                80
 05/09/2019   22:46:24   (   0.02,-137.07) (  -0.74,-140.60)  401.62                80