Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 7 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/10/2013   10:26:45   (  -0.18,-135.25) (  -0.21,-135.21)    5.57                80
 07/12/2013   22:27:16   (   0.19,-135.29) (   0.05,-135.97)   77.95                80
 07/13/2013   22:11:10   (   0.18,-135.30) (   1.04,-131.43)  440.75                80
 07/15/2013   10:30:17   (  -0.20,-135.33) (   0.13,-136.70)  156.49                80
 07/16/2013   10:14:13   (  -0.20,-135.34) (  -0.92,-132.17)  361.58                80
 07/17/2013   22:33:28   (   0.22,-135.34) (  -0.28,-137.46)  242.37                80
 07/18/2013   22:17:24   (   0.21,-135.35) (   0.77,-132.94)  275.19                80
 07/20/2013   10:36:31   (  -0.23,-135.36) (   0.40,-138.20)  323.57                80
 07/21/2013   10:20:26   (  -0.23,-135.36) (  -0.60,-133.66)  193.47                80
 07/22/2013   22:39:42   (   0.25,-135.35) (  -0.53,-138.97)  411.80                80
 07/23/2013   22:23:37   (   0.24,-135.35) (   0.46,-134.43)  105.23                80