Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 10 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/22/2016   10:25:03   (   0.17,-134.65) (   0.28,-135.17)   59.47                80
 10/23/2016   10:08:58   (   0.18,-134.60) (  -0.73,-130.64)  451.71                80
 10/24/2016   22:28:15   (  -0.15,-134.50) (  -0.49,-135.94)  164.54                80
 10/25/2016   22:12:10   (  -0.17,-134.46) (   0.52,-131.41)  346.96                80
 10/27/2016   10:31:18   (   0.14,-134.41) (   0.62,-136.69)  259.53                80
 10/28/2016   10:15:13   (   0.15,-134.36) (  -0.34,-132.15)  251.41                80
 10/29/2016   22:34:30   (  -0.13,-134.25) (  -0.82,-137.47)  366.27                80
 10/30/2016   22:18:25   (  -0.14,-134.20) (   0.13,-132.93)  144.74                80
 11/01/2016   10:37:33   (   0.11,-134.15) (   1.01,-138.21)  461.87                80
 11/02/2016   10:21:28   (   0.13,-134.09) (   0.05,-133.67)   48.33                80