Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 8 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/18/2017   22:40:11   (  -0.36,-135.02) (  -1.22,-138.86)  437.32                80
 08/19/2017   22:24:07   (  -0.35,-135.04) (  -0.19,-134.33)   80.11                80
 08/22/2017   10:27:12   (   0.35,-135.05) (   0.38,-135.07)    4.12                80
 08/24/2017   22:27:46   (  -0.35,-135.08) (  -0.54,-135.85)   88.85                80
 08/25/2017   22:11:42   (  -0.35,-135.09) (   0.50,-131.33)  428.39                80
 08/27/2017   10:33:32   (   0.35,-135.10) (   0.67,-136.60)  171.41                80
 08/28/2017   10:12:07   (   0.35,-135.10) (  -0.30,-132.07)  344.58                80
 08/29/2017   22:34:05   (  -0.35,-135.09) (  -0.88,-137.37)  260.51                80
 08/30/2017   22:18:01   (  -0.34,-135.10) (   0.15,-132.85)  255.96                80