Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 12 1.  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)  165.68                80
 12/02/2017   10:15:07   (   0.02,-135.37) (  -0.70,-132.28)  352.85                80
 12/03/2017   22:34:22   (  -0.00,-135.30) (  -0.52,-137.58)  260.14                80
 12/04/2017   22:18:18   (  -0.01,-135.31) (   0.52,-133.05)  257.90                80
 12/06/2017   10:37:25   (  -0.00,-135.42) (   0.65,-138.32)  331.01                80
 12/07/2017   10:21:20   (   0.00,-135.43) (  -0.33,-133.78)  186.62                80
 12/08/2017   22:40:36   (   0.02,-135.34) (  -0.82,-139.09)  427.43                80
 12/09/2017   22:24:30   (   0.01,-135.35) (   0.17,-134.56)   90.06                80
 12/11/2017   10:43:39   (  -0.02,-135.46) (   0.95,-139.84)  499.36                80
 12/12/2017   10:27:33   (  -0.02,-135.46) (  -0.04,-135.30)   18.06                80
 12/14/2017   22:28:04   (   0.02,-135.38) (  -0.12,-136.08)   79.28                80