Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 4 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/08/2016   10:19:10   (   0.05,-135.31) (  -0.36,-133.62)  193.25                80
 04/09/2016   22:41:07   (  -0.05,-135.33) (  -0.85,-138.92)  409.48                80
 04/10/2016   22:25:02   (  -0.05,-135.35) (   0.15,-134.39)  108.22                80
 04/12/2016   10:46:50   (   0.05,-135.37) (   1.04,-139.67)  490.22                80
 04/13/2016   10:25:27   (   0.06,-135.38) (  -0.02,-135.15)   27.15                80
 04/15/2016   22:28:39   (  -0.06,-135.40) (  -0.18,-135.92)   59.60                80
 04/16/2016   22:12:34   (  -0.06,-135.41) (   0.83,-131.39)  457.59                80
 04/18/2016   10:34:23   (   0.06,-135.43) (   0.36,-136.66)  141.48                80
 04/19/2016   10:12:58   (   0.06,-135.43) (  -0.64,-132.13)  375.29                80
 04/20/2016   22:34:55   (  -0.06,-135.43) (  -0.50,-137.45)  229.56                80
 04/21/2016   22:18:51   (  -0.06,-135.43) (   0.51,-132.92)  287.08                80