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   (  -0.05,-135.40) (  -0.18,-135.92)   59.53                80
 04/16/2016   22:12:34   (  -0.06,-135.42) (   0.83,-131.39)  458.77                80
 04/18/2016   10:34:22   (   0.06,-135.45) (   0.35,-136.66)  139.00                80
 04/19/2016   10:12:59   (   0.06,-135.46) (  -0.71,-132.14)  378.83                80
 04/20/2016   22:34:55   (  -0.06,-135.48) (  -0.49,-137.45)  224.09                80
 04/21/2016   22:18:51   (  -0.06,-135.49) (   0.52,-132.92)  293.64                80
 04/23/2016   10:40:39   (   0.06,-135.52) (   0.66,-138.19)  304.74                80
 04/24/2016   10:19:15   (   0.06,-135.53) (  -0.35,-133.66)  212.31                80
 04/25/2016   22:41:11   (  -0.06,-135.53) (  -0.84,-138.97)  392.31                80
 04/26/2016   22:25:06   (  -0.06,-135.53) (   0.17,-134.44)  124.56                80