Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 9 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/03/2013   22:34:23   (  -0.41,-135.38) (  -0.90,-137.45)  236.86                80
 09/04/2013   22:18:20   (  -0.41,-135.40) (   0.12,-132.93)  281.39                80
 09/06/2013   10:40:10   (   0.40,-135.48) (   1.00,-138.21)  311.02                80
 09/07/2013   10:18:47   (   0.41,-135.49) (  -0.02,-133.68)  206.41                80
 09/08/2013   22:40:44   (  -0.39,-135.44) (  -1.21,-138.98)  403.78                80
 09/09/2013   22:24:40   (  -0.40,-135.45) (  -0.19,-134.45)  113.55                80
 09/11/2013   10:43:51   (   0.38,-135.52) (   1.30,-139.73)  479.73                80
 09/12/2013   10:25:06   (   0.39,-135.52) (   0.33,-135.19)   36.67                80
 09/14/2013   22:28:21   (  -0.37,-135.45) (  -0.48,-135.98)   59.79                80
 09/15/2013   22:12:18   (  -0.38,-135.45) (   0.54,-131.45)  456.54                80