Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 5 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)
 05/13/2013   10:14:18   (   0.02,-135.43) (  -0.65,-132.32)  354.14                80
 05/14/2013   22:33:35   (  -0.01,-135.43) (  -0.51,-137.63)  251.19                80
 05/15/2013   22:17:31   (  -0.02,-135.42) (   0.49,-133.09)  265.39                80
 05/17/2013   10:36:39   (   0.01,-135.43) (   0.66,-138.36)  334.64                80
 05/18/2013   10:20:35   (   0.01,-135.42) (  -0.35,-133.83)  181.47                80
 05/19/2013   22:39:52   (  -0.00,-135.40) (  -0.82,-139.14)  425.25                80
 05/20/2013   22:23:47   (  -0.01,-135.40) (   0.20,-134.61)   90.63                80
 05/23/2013   10:24:10   (  -0.00,-135.38) (  -0.00,-135.33)    4.78                80
 05/25/2013   22:27:23   (   0.02,-135.32) (  -0.14,-136.11)   89.38                80
 05/26/2013   22:11:18   (   0.01,-135.30) (   0.82,-131.56)  425.27                80