Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 8 31.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/01/2016   22:24:25   (  -0.36,-135.31) (  -0.11,-134.31)  114.11                80
 09/03/2016   10:46:12   (   0.35,-135.36) (   1.33,-139.57)  481.25                80
 09/04/2016   10:24:47   (   0.36,-135.37) (   0.27,-135.05)   37.31                80
 09/06/2016   22:27:57   (  -0.35,-135.40) (  -0.43,-135.82)   47.39                80
 09/07/2016   22:11:52   (  -0.35,-135.41) (   0.57,-131.28)  471.01                80
 09/09/2016   10:33:39   (   0.34,-135.45) (   0.58,-136.55)  125.58                80
 09/10/2016   10:12:13   (   0.35,-135.46) (  -0.42,-132.02)  391.97                80
 09/11/2016   22:34:09   (  -0.33,-135.45) (  -0.74,-137.32)  213.27                80
 09/12/2016   22:18:03   (  -0.34,-135.45) (   0.26,-132.79)  304.26                80
 09/14/2016   10:39:51   (   0.32,-135.49) (   0.89,-138.06)  293.02                80