Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 3 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)
 03/10/2013   10:10:53   (  -0.01,-135.42) (  -0.72,-132.28)  358.15                80
 03/11/2013   22:35:30   (   0.00,-135.36) (  -0.51,-137.58)  252.83                80
 03/12/2013   22:14:06   (   0.01,-135.36) (   0.51,-133.05)  262.91                80
 03/14/2013   10:35:57   (  -0.01,-135.41) (   0.63,-138.33)  332.77                80
 03/15/2013   10:19:53   (  -0.01,-135.41) (  -0.39,-133.81)  182.76                80
 03/16/2013   22:41:51   (   0.00,-135.34) (  -0.84,-139.11)  428.97                80
 03/17/2013   22:20:27   (   0.00,-135.33) (   0.18,-134.58)   86.09                80
 03/20/2013   10:26:13   (   0.00,-135.36) (  -0.01,-135.32)    3.97                80
 03/22/2013   22:29:27   (  -0.00,-135.27) (  -0.18,-136.10)   94.17                80