Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 12 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/07/2013   10:16:32   (  -0.04,-135.38) (  -0.77,-132.22)  361.51                80
 12/08/2013   22:35:51   (   0.07,-135.32) (  -0.45,-137.52)  250.73                80
 12/09/2013   22:19:48   (   0.06,-135.30) (   0.59,-132.99)  263.79                80
 12/11/2013   10:38:59   (  -0.08,-135.32) (   0.60,-138.26)  336.59                80
 12/12/2013   10:22:56   (  -0.07,-135.30) (  -0.44,-133.74)  177.83                80
 12/13/2013   22:42:14   (   0.09,-135.23) (  -0.78,-139.04)  434.78                80
 12/14/2013   22:26:11   (   0.07,-135.21) (   0.21,-134.51)   79.20                80
 12/17/2013   10:26:39   (  -0.08,-135.18) (  -0.06,-135.26)    8.56                80
 12/19/2013   22:29:55   (   0.09,-135.08) (  -0.10,-136.04)  108.62                80