Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 5 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/23/2013   10:26:51   (  -0.00,-135.35) (  -0.03,-135.34)    3.57                80
 05/25/2013   22:27:22   (   0.01,-135.29) (  -0.16,-136.10)   91.96                80
 05/26/2013   22:11:18   (   0.01,-135.27) (   0.86,-131.57)  422.52                80
 05/28/2013   10:30:25   (  -0.02,-135.24) (   0.33,-136.83)  180.80                80
 05/29/2013   10:14:21   (  -0.01,-135.22) (  -0.69,-132.30)  333.30                80
 05/30/2013   22:33:37   (   0.02,-135.17) (  -0.52,-137.59)  276.39                80
 05/31/2013   22:17:33   (   0.02,-135.14) (   0.50,-133.06)  237.81                80
 06/02/2013   10:36:40   (  -0.03,-135.12) (   0.68,-138.32)  365.56                80
 06/03/2013   10:20:35   (  -0.03,-135.09) (  -0.34,-133.79)  148.18                80