Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 4 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/23/2013   22:27:11   (  -0.05,-135.18) (  -0.23,-136.12)  106.14                80
 04/24/2013   22:11:06   (  -0.05,-135.21) (   0.75,-131.58)  412.77                80
 04/26/2013   10:32:55   (   0.04,-135.24) (   0.39,-136.86)  184.11                80
 04/27/2013   10:11:31   (   0.04,-135.26) (  -0.60,-132.32)  334.04                80
 04/28/2013   22:33:28   (  -0.03,-135.27) (  -0.57,-137.63)  268.84                80
 04/29/2013   22:17:25   (  -0.04,-135.29) (   0.48,-133.11)  249.13                80
 05/01/2013   10:36:33   (   0.03,-135.31) (   0.71,-138.37)  348.65                80
 05/02/2013   10:20:29   (   0.04,-135.32) (  -0.28,-133.84)  169.01                80
 05/03/2013   22:39:46   (  -0.03,-135.33) (  -0.89,-139.14)  434.82                80
 05/04/2013   22:23:41   (  -0.04,-135.34) (   0.11,-134.61)   82.87                80