Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 3 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/12/2013   22:14:07   (   0.01,-135.37) (   0.52,-133.05)  263.72                80
 03/14/2013   10:35:57   (  -0.01,-135.42) (   0.62,-138.34)  332.19                80
 03/15/2013   10:19:52   (  -0.01,-135.41) (  -0.34,-133.80)  183.41                80
 03/16/2013   22:41:51   (   0.01,-135.35) (  -0.82,-139.11)  427.93                80
 03/17/2013   22:20:27   (   0.01,-135.34) (   0.20,-134.58)   87.26                80
 03/20/2013   10:23:33   (  -0.00,-135.37) (  -0.04,-135.33)    6.02                80
 03/22/2013   22:29:26   (  -0.00,-135.28) (  -0.20,-136.09)   92.60                80
 03/23/2013   22:08:02   (  -0.00,-135.27) (   0.83,-131.57)  421.80                80
 03/25/2013   10:29:52   (   0.00,-135.29) (   0.35,-136.84)  176.60                80