Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 5 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/15/2013   22:17:31   (  -0.02,-135.42) (   0.48,-133.09)  265.45                80
 05/17/2013   10:36:39   (   0.01,-135.42) (   0.67,-138.36)  335.31                80
 05/18/2013   10:20:34   (   0.02,-135.41) (  -0.34,-133.83)  180.74                80
 05/19/2013   22:39:52   (  -0.00,-135.40) (  -0.82,-139.14)  425.38                80
 05/20/2013   22:23:47   (  -0.01,-135.39) (   0.19,-134.60)   90.46                80
 05/23/2013   10:26:21   (  -0.00,-135.37) (  -0.01,-135.33)    3.80                51
 05/25/2013   22:27:22   (   0.01,-135.31) (  -0.19,-136.09)   89.77                80
 05/26/2013   22:11:17   (   0.01,-135.29) (   0.83,-131.56)  424.87                80
 05/28/2013   10:30:26   (  -0.02,-135.27) (   0.31,-136.84)  178.32                80
 05/29/2013   10:14:20   (  -0.01,-135.24) (  -0.66,-132.29)  335.93                80