Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 4 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/13/2015   22:32:55   (  -0.05,-135.01) (  -0.27,-135.90)  101.71                80
 04/14/2015   22:16:50   (  -0.05,-135.04) (   0.79,-131.38)  418.28                80
 04/16/2015   10:38:35   (   0.05,-135.13) (   0.40,-136.64)  172.78                80
 04/17/2015   10:17:08   (   0.05,-135.15) (  -0.60,-132.10)  346.64                80
 04/18/2015   22:39:03   (  -0.05,-135.15) (  -0.54,-137.41)  258.02                80
 04/19/2015   22:22:56   (  -0.05,-135.17) (   0.46,-132.88)  261.27                80
 04/21/2015   10:44:42   (   0.05,-135.25) (   0.72,-138.14)  330.50                80
 04/22/2015   10:23:16   (   0.05,-135.26) (  -0.35,-133.62)  188.38                80
 04/23/2015   22:45:09   (  -0.05,-135.25) (  -0.85,-138.91)  417.37                80
 04/24/2015   22:29:03   (  -0.05,-135.26) (   0.16,-134.38)  101.48                80