Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 7 8.  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   10:24:04   (  -0.18,-135.25) (  -0.17,-135.20)    6.05                80
 07/12/2013   22:27:16   (   0.19,-135.29) (   0.06,-135.98)   77.79                80
 07/13/2013   22:11:10   (   0.18,-135.30) (   1.05,-131.44)  440.94                80
 07/15/2013   10:30:18   (  -0.20,-135.33) (   0.12,-136.70)  156.61                80
 07/16/2013   10:14:13   (  -0.20,-135.34) (  -0.93,-132.17)  361.45                80
 07/17/2013   22:33:29   (   0.22,-135.34) (  -0.27,-137.47)  242.17                80
 07/18/2013   22:17:24   (   0.21,-135.35) (   0.78,-132.94)  275.40                80
 07/20/2013   10:36:31   (  -0.23,-135.36) (   0.39,-138.20)  323.71                80
 07/21/2013   10:20:26   (  -0.23,-135.36) (  -0.60,-133.66)  193.33                80