Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 5 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)
 05/20/2013   22:23:47   (  -0.01,-135.38) (   0.18,-134.60)   89.05                80
 05/23/2013   10:24:10   (   0.00,-135.35) (   0.01,-135.33)    2.39                80
 05/25/2013   22:27:23   (   0.01,-135.29) (  -0.14,-136.10)   91.74                80
 05/26/2013   22:11:17   (   0.00,-135.27) (   0.82,-131.56)  422.80                80
 05/28/2013   10:30:25   (  -0.02,-135.24) (   0.32,-136.83)  180.53                80
 05/29/2013   10:14:20   (  -0.01,-135.22) (  -0.65,-132.29)  333.61                80
 05/30/2013   22:33:37   (   0.02,-135.17) (  -0.50,-137.60)  276.02                80
 05/31/2013   22:17:32   (   0.01,-135.15) (   0.46,-133.05)  238.20                80
 06/02/2013   10:36:40   (  -0.03,-135.12) (   0.66,-138.33)  365.20                80
 06/03/2013   10:20:35   (  -0.03,-135.09) (  -0.30,-133.79)  148.56                80