Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 6 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)
 06/18/2013   10:36:37   (  -0.09,-134.53) (   0.75,-138.25)  425.10                80
 06/19/2013   10:20:32   (  -0.09,-134.48) (  -0.28,-133.73)   86.25                80
 06/21/2013   22:21:03   (   0.10,-134.33) (   0.07,-134.48)   16.68                80
 06/22/2013   22:04:58   (   0.09,-134.28) (   1.05,-129.94)  494.18                80
 06/24/2013   10:24:05   (  -0.11,-134.20) (   0.12,-135.20)  115.19                80
 06/25/2013   10:07:59   (  -0.11,-134.13) (  -0.85,-130.66)  395.20                80
 06/26/2013   22:27:16   (   0.13,-134.03) (  -0.32,-135.96)  220.12                80
 06/27/2013   22:11:11   (   0.12,-133.97) (   0.72,-131.43)  290.47                80
 06/29/2013   10:30:17   (  -0.14,-133.89) (   0.52,-136.68)  318.80                80
 06/30/2013   10:14:13   (  -0.13,-133.83) (  -0.52,-132.15)  191.29                80