Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2014 4 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/18/2014   10:44:50   (   0.01,-135.44) (   0.66,-138.35)  332.19                80
 04/19/2014   10:23:28   (   0.01,-135.43) (  -0.36,-133.83)  183.33                80
 04/20/2014   22:45:27   (  -0.01,-135.41) (  -0.82,-139.13)  423.80                80
 04/21/2014   22:29:24   (  -0.01,-135.40) (   0.15,-134.59)   91.55                80
 04/24/2014   10:29:51   (   0.01,-135.39) (   0.02,-135.34)    6.53                80
 04/26/2014   22:33:08   (  -0.01,-135.35) (  -0.16,-136.12)   87.12                80
 04/27/2014   22:17:05   (  -0.01,-135.34) (   0.82,-131.58)  427.67                80
 04/29/2014   10:38:55   (   0.00,-135.33) (   0.37,-136.85)  173.59                80
 04/30/2014   10:17:33   (   0.00,-135.32) (  -0.67,-132.33)  340.75                80