Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 8 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/17/2013   10:14:57   (  -0.32,-135.01) (  -0.91,-132.26)  312.39                80
 08/18/2013   22:34:16   (   0.33,-134.94) (  -0.26,-137.57)  299.63                80
 08/19/2013   22:18:12   (   0.33,-134.90) (   0.75,-133.04)  212.65                80
 08/21/2013   10:40:01   (  -0.34,-134.86) (   0.46,-138.30)  393.07                80
 08/22/2013   10:21:18   (  -0.33,-134.82) (  -0.55,-133.78)  119.02                80
 08/23/2013   22:40:36   (   0.34,-134.75) (  -0.63,-139.08)  493.62                80
 08/24/2013   22:24:33   (   0.34,-134.71) (   0.38,-134.56)   18.30                80
 08/27/2013   10:27:39   (  -0.34,-134.62) (  -0.19,-135.29)   76.46                80
 08/28/2013   10:08:55   (  -0.34,-134.58) (  -1.20,-130.76)  434.76                80
 08/29/2013   22:28:12   (   0.35,-134.49) (  -0.03,-136.06)  179.21                80
 08/30/2013   22:12:09   (   0.35,-134.45) (   0.98,-131.53)  331.82                80