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) (   1.08,-138.07)  352.63                80
 08/17/2017   10:18:13   (   0.35,-134.99) (   0.04,-133.55)  164.14                80
 08/18/2017   22:40:10   (  -0.36,-135.02) (  -1.24,-138.85)  437.50                80
 08/19/2017   22:24:07   (  -0.35,-135.03) (  -0.21,-134.33)   79.96                80
 08/22/2017   10:27:13   (   0.35,-135.05) (   0.34,-135.08)    3.15                80
 08/24/2017   22:27:47   (  -0.35,-135.07) (  -0.50,-135.86)   89.16                80
 08/25/2017   22:11:42   (  -0.35,-135.09) (   0.48,-131.33)  428.10                80
 08/27/2017   10:33:31   (   0.35,-135.10) (   0.70,-136.60)  171.47                80
 08/28/2017   10:12:08   (   0.35,-135.10) (  -0.34,-132.08)  344.49                80