Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 6 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/29/2013   10:30:22   (  -0.14,-134.97) (   0.24,-136.74)  200.88                80
 06/30/2013   10:14:16   (  -0.13,-135.01) (  -0.74,-132.20)  319.75                80
 07/01/2013   22:33:33   (   0.15,-135.04) (  -0.43,-137.50)  281.55                80
 07/02/2013   22:17:28   (   0.14,-135.07) (   0.62,-132.97)  238.86                80
 07/04/2013   10:36:36   (  -0.16,-135.14) (   0.55,-138.24)  354.10                80
 07/05/2013   10:20:31   (  -0.16,-135.16) (  -0.49,-133.71)  165.79                80
 07/06/2013   22:39:47   (   0.18,-135.18) (  -0.67,-139.01)  436.83                80
 07/07/2013   22:23:42   (   0.17,-135.20) (   0.32,-134.47)   82.90                80
 07/10/2013   10:26:45   (  -0.19,-135.29) (  -0.19,-135.21)    8.61                80