Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 5 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/18/2013   10:20:35   (   0.02,-135.41) (  -0.35,-133.83)  180.00                80
 05/19/2013   22:39:51   (  -0.01,-135.39) (  -0.87,-139.13)  426.06                80
 05/20/2013   22:23:46   (  -0.01,-135.38) (   0.14,-134.59)   89.73                80
 05/23/2013   10:26:50   (  -0.00,-135.35) (  -0.01,-135.33)    2.77                80
 05/25/2013   22:27:22   (   0.01,-135.30) (  -0.19,-136.10)   90.89                80
 05/26/2013   22:11:18   (   0.00,-135.28) (   0.83,-131.56)  423.66                80
 05/28/2013   10:30:26   (  -0.02,-135.25) (   0.31,-136.84)  179.82                80
 05/29/2013   10:14:20   (  -0.01,-135.23) (  -0.65,-132.29)  334.35                80
 05/30/2013   22:33:38   (   0.02,-135.18) (  -0.51,-137.60)  275.08                80
 05/31/2013   22:17:33   (   0.02,-135.16) (   0.51,-133.07)  239.17                80