Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 7 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/05/2017   10:26:55   (  -0.11,-135.41) (  -0.15,-135.13)   31.26                80
 07/07/2017   22:27:26   (   0.13,-135.41) (  -0.01,-135.90)   57.05                80
 07/08/2017   22:11:22   (   0.12,-135.39) (   1.03,-131.37)  458.33                80
 07/10/2017   10:30:29   (  -0.14,-135.34) (   0.14,-136.64)  148.51                80
 07/11/2017   10:14:24   (  -0.13,-135.32) (  -0.84,-132.10)  366.21                80
 07/12/2017   22:33:41   (   0.16,-135.31) (  -0.29,-137.41)  238.91                80
 07/13/2017   22:17:36   (   0.15,-135.29) (   0.69,-132.87)  275.79                80
 07/15/2017   10:36:43   (  -0.17,-135.23) (   0.48,-138.14)  331.53                80
 07/16/2017   10:20:38   (  -0.16,-135.21) (  -0.50,-133.60)  182.44                80
 07/17/2017   22:39:55   (   0.18,-135.19) (  -0.62,-138.92)  424.58                80
 07/18/2017   22:23:49   (   0.18,-135.16) (   0.35,-134.38)   89.12                80