Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 4 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/11/2015   10:32:27   (   0.04,-134.98) (   0.11,-135.13)   18.93                80
 04/13/2015   22:32:55   (  -0.05,-135.01) (  -0.26,-135.90)  102.04                80
 04/14/2015   22:16:49   (  -0.05,-135.04) (   0.74,-131.37)  417.89                80
 04/16/2015   10:38:35   (   0.05,-135.12) (   0.38,-136.64)  173.25                80
 04/17/2015   10:17:09   (   0.05,-135.15) (  -0.62,-132.11)  346.12                80
 04/18/2015   22:39:02   (  -0.05,-135.14) (  -0.58,-137.40)  258.55                80
 04/19/2015   22:22:56   (  -0.05,-135.16) (   0.49,-132.88)  260.74                80
 04/21/2015   10:44:42   (   0.05,-135.24) (   0.69,-138.15)  331.10                80
 04/22/2015   10:23:15   (   0.05,-135.26) (  -0.31,-133.61)  187.71                80