Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 4 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/15/2016   22:28:39   (  -0.06,-135.38) (  -0.18,-135.92)   61.05                80
 04/16/2016   22:12:34   (  -0.06,-135.39) (   0.83,-131.39)  455.92                80
 04/18/2016   10:34:22   (   0.06,-135.41) (   0.35,-136.66)  143.12                80
 04/19/2016   10:12:58   (   0.06,-135.41) (  -0.65,-132.13)  373.39                80
 04/20/2016   22:34:54   (  -0.06,-135.40) (  -0.54,-137.44)  232.26                80
 04/21/2016   22:18:50   (  -0.06,-135.41) (   0.47,-132.91)  284.19                80
 04/23/2016   10:40:39   (   0.06,-135.42) (   0.66,-138.19)  315.58                80
 04/24/2016   10:19:15   (   0.06,-135.41) (  -0.35,-133.66)  200.22                80
 04/25/2016   22:41:11   (  -0.06,-135.39) (  -0.84,-138.97)  407.08                80
 04/26/2016   22:25:06   (  -0.07,-135.38) (   0.17,-134.44)  108.50                80