Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 5 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)
 05/09/2013   22:27:19   (  -0.02,-135.42) (  -0.19,-136.12)   79.97                80
 05/10/2013   22:11:14   (  -0.02,-135.43) (   0.82,-131.59)  437.17                80
 05/12/2013   10:30:23   (   0.01,-135.44) (   0.35,-136.86)  162.30                80
 05/13/2013   10:14:18   (   0.02,-135.44) (  -0.66,-132.32)  354.39                80
 05/14/2013   22:33:35   (  -0.01,-135.43) (  -0.51,-137.63)  250.94                80
 05/15/2013   22:17:31   (  -0.02,-135.43) (   0.50,-133.10)  265.65                80
 05/17/2013   10:36:39   (   0.01,-135.43) (   0.66,-138.37)  334.34                80
 05/18/2013   10:20:35   (   0.01,-135.43) (  -0.35,-133.83)  181.78                80
 05/19/2013   22:39:52   (  -0.00,-135.41) (  -0.82,-139.14)  424.94                80
 05/20/2013   22:23:48   (  -0.01,-135.40) (   0.19,-134.61)   90.93                80