Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 9 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/04/2013   22:18:20   (  -0.41,-135.40) (   0.15,-132.93)  281.72                80
 09/06/2013   10:40:10   (   0.40,-135.47) (   1.02,-138.20)  312.36                80
 09/07/2013   10:18:46   (   0.41,-135.47) (   0.00,-133.68)  204.93                80
 09/08/2013   22:40:44   (  -0.39,-135.44) (  -1.17,-138.99)  403.98                80
 09/09/2013   22:24:41   (  -0.40,-135.44) (  -0.15,-134.46)  113.24                80
 09/11/2013   10:43:50   (   0.38,-135.50) (   1.31,-139.73)  481.74                80
 09/12/2013   10:25:06   (   0.39,-135.50) (   0.34,-135.19)   34.59                80
 09/14/2013   22:28:21   (  -0.37,-135.44) (  -0.48,-135.97)   60.74                80
 09/15/2013   22:12:17   (  -0.38,-135.44) (   0.55,-131.45)  455.48                80
 09/17/2013   10:31:26   (   0.35,-135.49) (   0.61,-136.72)  140.33                80