Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 8 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/11/2013   10:24:40   (  -0.30,-135.18) (  -0.29,-135.28)   11.47                80
 08/13/2013   22:27:55   (   0.31,-135.10) (   0.12,-136.06)  108.03                80
 08/14/2013   22:11:52   (   0.31,-135.07) (   1.13,-131.53)  404.84                80
 08/16/2013   10:31:01   (  -0.32,-135.03) (   0.08,-136.79)  201.44                80
 08/17/2013   10:14:57   (  -0.32,-134.99) (  -0.93,-132.26)  310.82                80
 08/18/2013   22:34:16   (   0.33,-134.93) (  -0.25,-137.57)  300.65                80
 08/19/2013   22:18:12   (   0.33,-134.90) (   0.76,-133.04)  211.57                80
 08/21/2013   10:40:01   (  -0.33,-134.85) (   0.44,-138.31)  394.97                80
 08/22/2013   10:21:18   (  -0.33,-134.81) (  -0.57,-133.78)  117.02                80