Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 5 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)
 05/01/2016   22:28:41   (  -0.06,-135.29) (  -0.23,-135.94)   74.39                80
 05/02/2016   22:12:37   (  -0.07,-135.28) (   0.78,-131.41)  440.28                80
 05/04/2016   10:34:25   (   0.06,-135.25) (   0.39,-136.69)  164.02                80
 05/05/2016   10:13:00   (   0.06,-135.23) (  -0.63,-132.16)  349.91                80
 05/06/2016   22:34:57   (  -0.06,-135.19) (  -0.56,-137.46)  258.80                80
 05/07/2016   22:18:52   (  -0.06,-135.17) (   0.46,-132.93)  254.98                80
 05/09/2016   10:40:41   (   0.05,-135.13) (   0.71,-138.21)  350.13                80
 05/10/2016   10:19:15   (   0.05,-135.10) (  -0.25,-133.67)  163.15                80
 05/11/2016   22:41:11   (  -0.05,-135.05) (  -0.93,-138.97)  446.99                80
 05/12/2016   22:25:07   (  -0.05,-135.02) (   0.09,-134.44)   66.40                80