Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 3 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/14/2016   22:31:19   (  -0.00,-134.61) (  -0.25,-135.86)  141.11                80
 03/15/2016   22:09:52   (  -0.00,-134.57) (   0.71,-131.31)  370.76                80
 03/17/2016   10:31:38   (   0.01,-134.53) (   0.47,-136.58)  234.21                80
 03/18/2016   10:15:33   (   0.01,-134.48) (  -0.55,-132.05)  277.51                80
 03/19/2016   22:37:27   (  -0.01,-134.39) (  -0.68,-137.34)  336.67                80
 03/20/2016   22:16:02   (  -0.01,-134.34) (   0.34,-132.81)  174.82                80
 03/22/2016   10:37:48   (   0.01,-134.29) (   0.83,-138.07)  430.86                80
 03/23/2016   10:21:42   (   0.01,-134.24) (  -0.13,-133.53)   80.52                80
 03/25/2016   22:24:50   (  -0.01,-134.09) (  -0.07,-134.29)   23.33                80
 03/26/2016   22:03:25   (  -0.00,-134.04) (   0.96,-129.76)  487.49                80