Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 8 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/09/2018   10:27:18   (  -0.31,-135.29) (  -0.36,-135.21)   10.21                80
 08/11/2018   22:27:51   (   0.32,-135.26) (   0.14,-135.98)   82.27                80
 08/12/2018   22:11:47   (   0.31,-135.23) (   1.18,-131.45)  431.45                80
 08/14/2018   10:30:56   (  -0.33,-135.16) (   0.02,-136.72)  177.96                80
 08/15/2018   10:14:51   (  -0.32,-135.13) (  -0.96,-132.18)  335.36                80
 08/16/2018   22:34:09   (   0.34,-135.12) (  -0.17,-137.50)  271.10                80
 08/17/2018   22:18:05   (   0.34,-135.09) (   0.82,-132.97)  242.12                80
 08/19/2018   10:37:13   (  -0.36,-135.01) (   0.39,-138.23)  367.74                80
 08/20/2018   10:21:10   (  -0.35,-134.98) (  -0.66,-133.71)  144.85                80