Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 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)
 12/01/2016   22:18:30   (  -0.01,-135.37) (   0.49,-133.05)  263.01                80
 12/03/2016   10:37:38   (  -0.01,-135.40) (   0.65,-138.33)  334.83                80
 12/04/2016   10:21:34   (  -0.00,-135.39) (  -0.38,-133.81)  181.15                80
 12/05/2016   22:40:49   (   0.02,-135.34) (  -0.85,-139.10)  429.37                80
 12/06/2016   22:24:45   (   0.01,-135.33) (   0.19,-134.58)   86.29                80
 12/09/2016   10:27:08   (  -0.02,-135.34) (  -0.02,-135.32)    2.73                40
 12/11/2016   22:28:18   (   0.03,-135.26) (  -0.16,-136.09)   94.13                80
 12/12/2016   22:12:13   (   0.02,-135.24) (   0.82,-131.55)  420.51                80
 12/14/2016   10:31:21   (  -0.03,-135.25) (   0.32,-136.83)  179.93                80