Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 8 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/16/2017   10:39:37   (   0.36,-134.98) (   1.07,-138.08)  352.59                80
 08/17/2017   10:18:13   (   0.35,-134.99) (   0.04,-133.55)  164.13                80
 08/18/2017   22:40:10   (  -0.36,-135.02) (  -1.23,-138.86)  437.68                80
 08/19/2017   22:24:07   (  -0.35,-135.03) (  -0.20,-134.33)   79.74                80
 08/22/2017   10:27:13   (   0.35,-135.05) (   0.33,-135.08)    3.93                80
 08/24/2017   22:27:46   (  -0.35,-135.07) (  -0.55,-135.85)   89.45                80
 08/25/2017   22:11:42   (  -0.35,-135.08) (   0.49,-131.33)  427.78                80
 08/27/2017   10:33:32   (   0.35,-135.10) (   0.68,-136.60)  171.65                80
 08/28/2017   10:12:08   (   0.35,-135.10) (  -0.35,-132.08)  344.29                80