Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 4 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/01/2016   22:28:42   (  -0.06,-135.29) (  -0.18,-135.95)   74.61                80
 05/02/2016   22:12:36   (  -0.07,-135.28) (   0.77,-131.41)  440.02                80
 05/04/2016   10:34:25   (   0.06,-135.25) (   0.40,-136.68)  164.31                80
 05/05/2016   10:13:00   (   0.06,-135.22) (  -0.62,-132.15)  349.55                80
 05/06/2016   22:34:57   (  -0.06,-135.19) (  -0.57,-137.46)  259.35                80
 05/07/2016   22:18:52   (  -0.06,-135.16) (   0.44,-132.93)  254.36                80
 05/09/2016   10:40:40   (   0.05,-135.13) (   0.73,-138.21)  350.75                80
 05/10/2016   10:19:16   (   0.05,-135.10) (  -0.29,-133.68)  162.45                80
 05/11/2016   22:41:11   (  -0.05,-135.04) (  -0.95,-138.97)  447.93                80
 05/12/2016   22:25:07   (  -0.05,-135.02) (   0.07,-134.44)   65.39                80