Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 5 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/08/2019   10:24:26   (   0.00,-137.21) (  -0.42,-135.29)  218.39                80
 05/09/2019   22:46:24   (   0.00,-137.17) (  -0.77,-140.59)  390.10                80
 05/10/2019   22:30:19   (   0.00,-137.17) (   0.22,-136.06)  125.39                80
 05/12/2019   10:52:08   (  -0.00,-137.18) (   0.92,-141.34)  474.00                80
 05/13/2019   10:30:44   (  -0.00,-137.17) (  -0.07,-136.81)   40.91                80
 05/15/2019   22:33:57   (   0.00,-137.11) (  -0.11,-137.58)   53.91                80
 05/16/2019   22:17:53   (   0.01,-137.10) (   0.94,-133.06)  460.97                80
 05/18/2019   10:39:42   (  -0.01,-137.11) (   0.26,-138.33)  139.21                80
 05/19/2019   10:18:17   (  -0.01,-137.09) (  -0.73,-133.79)  374.91                80
 05/20/2019   22:40:14   (   0.02,-137.03) (  -0.44,-139.10)  236.44                80