Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 11 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/01/2017   10:31:11   (   0.01,-135.35) (   0.34,-136.81)  165.72                80
 12/02/2017   10:15:07   (   0.02,-135.37) (  -0.70,-132.28)  352.76                80
 12/03/2017   22:34:22   (  -0.00,-135.29) (  -0.52,-137.58)  260.45                80
 12/04/2017   22:18:18   (  -0.01,-135.31) (   0.52,-133.05)  257.53                80
 12/06/2017   10:37:25   (  -0.00,-135.42) (   0.65,-138.32)  331.36                80
 12/07/2017   10:21:20   (   0.00,-135.42) (  -0.34,-133.79)  186.22                80
 12/08/2017   22:40:36   (   0.02,-135.34) (  -0.82,-139.10)  428.02                80
 12/09/2017   22:24:31   (   0.01,-135.35) (   0.17,-134.56)   89.40                80
 12/12/2017   10:27:33   (  -0.02,-135.46) (  -0.04,-135.30)   17.32                80