Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 4 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/29/2016   10:25:30   (   0.06,-135.33) (   0.02,-135.17)   17.80                80
 05/01/2016   22:28:42   (  -0.06,-135.29) (  -0.20,-135.95)   74.80                80
 05/02/2016   22:12:37   (  -0.07,-135.27) (   0.82,-131.42)  439.72                80
 05/04/2016   10:34:25   (   0.06,-135.24) (   0.36,-136.69)  164.58                80
 05/05/2016   10:13:00   (   0.06,-135.22) (  -0.60,-132.15)  349.25                80
 05/06/2016   22:34:56   (  -0.06,-135.18) (  -0.59,-137.46)  259.87                80
 05/07/2016   22:18:52   (  -0.06,-135.16) (   0.43,-132.93)  253.81                80
 05/09/2016   10:40:40   (   0.05,-135.12) (   0.74,-138.20)  351.25                80
 05/10/2016   10:19:16   (   0.05,-135.09) (  -0.27,-133.67)  161.88                80
 05/11/2016   22:41:12   (  -0.05,-135.04) (  -0.91,-138.98)  448.69                80