Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 4 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/05/2015   10:45:07   (   0.04,-134.75) (   0.78,-138.17)  389.16                80
 04/06/2015   10:23:40   (   0.04,-134.79) (  -0.22,-133.63)  131.86                80
 04/07/2015   22:48:14   (  -0.04,-134.81) (  -0.94,-138.94)  470.46                80
 04/08/2015   22:29:28   (  -0.04,-134.85) (   0.05,-134.40)   50.32                80
 04/11/2015   10:32:28   (   0.04,-134.98) (   0.09,-135.14)   19.00                80
 04/13/2015   22:32:56   (  -0.05,-135.00) (  -0.23,-135.91)  102.97                80
 04/14/2015   22:16:49   (  -0.05,-135.03) (   0.77,-131.37)  416.90                80
 04/16/2015   10:38:34   (   0.05,-135.12) (   0.42,-136.64)  173.80                80
 04/17/2015   10:17:09   (   0.05,-135.14) (  -0.65,-132.11)  345.59                80
 04/18/2015   22:41:42   (  -0.05,-135.13) (  -0.54,-137.41)  259.57                80