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)
 04/22/2013   10:05:13   (   0.05,-135.15) (  -0.94,-130.81)  494.57                80
 04/23/2013   22:27:11   (  -0.05,-135.18) (  -0.23,-136.12)  106.27                80
 04/24/2013   22:11:06   (  -0.05,-135.21) (   0.75,-131.58)  412.62                80
 04/26/2013   10:32:55   (   0.04,-135.24) (   0.39,-136.86)  184.25                80
 04/27/2013   10:11:31   (   0.04,-135.26) (  -0.60,-132.32)  333.89                80
 04/28/2013   22:33:28   (  -0.03,-135.27) (  -0.58,-137.63)  269.05                80
 04/29/2013   22:17:25   (  -0.04,-135.29) (   0.47,-133.11)  248.88                80
 05/01/2013   10:36:33   (   0.03,-135.31) (   0.73,-138.37)  348.91                80
 05/02/2013   10:20:30   (   0.04,-135.32) (  -0.32,-133.85)  168.74                80
 05/03/2013   22:39:46   (  -0.03,-135.33) (  -0.91,-139.14)  435.18                80
 05/04/2013   22:23:43   (  -0.04,-135.34) (   0.14,-134.62)   82.45                80