Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 6 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/01/2013   22:33:33   (   0.15,-135.04) (  -0.40,-137.51)  281.32                80
 07/02/2013   22:17:29   (   0.14,-135.07) (   0.64,-132.98)  238.99                80
 07/04/2013   10:36:36   (  -0.16,-135.13) (   0.53,-138.24)  354.85                80
 07/05/2013   10:20:30   (  -0.16,-135.15) (  -0.46,-133.70)  164.94                80
 07/06/2013   22:39:47   (   0.18,-135.17) (  -0.71,-139.00)  437.18                80
 07/07/2013   22:23:42   (   0.17,-135.20) (   0.34,-134.48)   82.43                80
 07/10/2013   10:26:45   (  -0.18,-135.27) (  -0.21,-135.21)    7.28                80
 07/12/2013   22:27:16   (   0.19,-135.30) (   0.05,-135.98)   76.93                80
 07/13/2013   22:11:10   (   0.18,-135.32) (   1.03,-131.43)  441.95                80