Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 6 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)
 06/25/2013   10:08:02   (  -0.11,-134.82) (  -1.04,-130.70)  470.11                80
 06/26/2013   22:27:19   (   0.13,-134.88) (  -0.13,-136.00)  127.60                80
 06/27/2013   22:11:14   (   0.12,-134.92) (   0.91,-131.47)  393.58                80
 06/29/2013   10:30:22   (  -0.14,-134.98) (   0.26,-136.74)  200.70                80
 06/30/2013   10:14:17   (  -0.13,-135.01) (  -0.78,-132.21)  320.05                80
 07/01/2013   22:33:33   (   0.15,-135.06) (  -0.39,-137.51)  278.75                80
 07/02/2013   22:17:28   (   0.14,-135.10) (   0.60,-132.97)  241.85                80
 07/04/2013   10:36:36   (  -0.16,-135.15) (   0.52,-138.25)  353.11                80
 07/05/2013   10:20:31   (  -0.16,-135.17) (  -0.47,-133.71)  166.91                80
 07/06/2013   22:39:47   (   0.18,-135.21) (  -0.69,-139.01)  433.33                80
 07/07/2013   22:23:43   (   0.17,-135.24) (   0.35,-134.48)   86.60                80