Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 5 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/10/2019   22:30:19   (  -0.00,-137.18) (   0.22,-136.06)  127.32                80
 05/12/2019   10:52:08   (   0.00,-137.21) (   0.92,-141.34)  470.31                80
 05/13/2019   10:30:44   (   0.00,-137.21) (  -0.07,-136.81)   45.86                80
 05/15/2019   22:33:57   (  -0.00,-137.18) (  -0.11,-137.58)   45.86                80
 05/16/2019   22:17:53   (  -0.00,-137.18) (   0.94,-133.06)  470.35                80
 05/18/2019   10:39:42   (  -0.00,-137.21) (   0.26,-138.33)  127.98                80
 05/19/2019   10:18:18   (  -0.01,-137.20) (  -0.79,-133.81)  387.40                80
 05/20/2019   22:40:14   (   0.01,-137.16) (  -0.44,-139.10)  222.00                80
 05/21/2019   22:24:11   (   0.02,-137.15) (   0.62,-134.58)  293.32                80
 05/23/2019   10:45:59   (  -0.02,-137.17) (   0.58,-139.85)  305.68                80
 05/24/2019   10:24:35   (  -0.02,-137.15) (  -0.41,-135.32)  209.16                80