Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 5 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/09/2019   22:46:23   (  -0.01,-137.17) (  -0.79,-140.59)  390.14                80
 05/10/2019   22:30:20   (  -0.01,-137.16) (   0.26,-136.07)  125.20                80
 05/12/2019   10:52:08   (   0.00,-137.17) (   0.94,-141.34)  474.44                80
 05/13/2019   10:30:44   (   0.00,-137.16) (  -0.05,-136.80)   40.38                80
 05/15/2019   22:33:57   (  -0.00,-137.10) (  -0.13,-137.58)   54.94                80
 05/16/2019   22:17:53   (  -0.00,-137.09) (   0.92,-133.06)  459.90                80
 05/18/2019   10:39:41   (   0.00,-137.09) (   0.28,-138.32)  140.37                80
 05/19/2019   10:18:17   (   0.00,-137.07) (  -0.71,-133.79)  373.69                80
 05/20/2019   22:40:14   (   0.00,-137.01) (  -0.46,-139.10)  237.87                80
 05/21/2019   22:24:10   (   0.01,-136.99) (   0.53,-134.56)  276.10                80