Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 7 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/12/2013   22:27:15   (   0.19,-135.29) (   0.02,-135.97)   77.97                80
 07/13/2013   22:11:11   (   0.18,-135.30) (   1.07,-131.44)  440.75                80
 07/15/2013   10:30:18   (  -0.20,-135.33) (   0.10,-136.70)  156.47                80
 07/16/2013   10:14:13   (  -0.20,-135.34) (  -0.89,-132.16)  361.58                80
 07/17/2013   22:33:29   (   0.22,-135.34) (  -0.25,-137.47)  242.37                80
 07/18/2013   22:17:23   (   0.21,-135.35) (   0.75,-132.93)  275.18                80
 07/20/2013   10:36:31   (  -0.23,-135.36) (   0.42,-138.19)  323.59                80
 07/21/2013   10:20:26   (  -0.23,-135.36) (  -0.63,-133.67)  193.47                80
 07/22/2013   22:39:41   (   0.25,-135.35) (  -0.56,-138.96)  411.79                80
 07/23/2013   22:23:36   (   0.24,-135.35) (   0.43,-134.42)  105.23                80