Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 4 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/26/2013   10:32:55   (   0.04,-135.24) (   0.39,-136.86)  183.92                80
 04/27/2013   10:11:31   (   0.04,-135.26) (  -0.60,-132.32)  334.23                80
 04/28/2013   22:33:28   (  -0.03,-135.28) (  -0.57,-137.63)  268.07                80
 04/29/2013   22:17:25   (  -0.04,-135.29) (   0.48,-133.11)  249.92                80
 05/01/2013   10:39:13   (   0.03,-135.31) (   0.71,-138.37)  348.34                80
 05/02/2013   10:17:49   (   0.04,-135.32) (  -0.29,-133.84)  169.33                80
 05/03/2013   22:39:46   (  -0.03,-135.34) (  -0.88,-139.14)  433.95                80
 05/04/2013   22:23:41   (  -0.04,-135.35) (   0.12,-134.61)   83.75                80
 05/07/2013   10:26:46   (   0.03,-135.37) (   0.00,-135.36)    3.56                80