Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 8 10.  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   10:27:20   (  -0.30,-135.18) (  -0.30,-135.28)   11.57                80
 08/13/2013   22:27:54   (   0.31,-135.10) (   0.07,-136.05)  107.94                80
 08/14/2013   22:11:52   (   0.31,-135.07) (   1.14,-131.53)  404.95                80
 08/16/2013   10:31:01   (  -0.32,-135.03) (   0.08,-136.79)  201.34                80
 08/17/2013   10:14:58   (  -0.32,-134.99) (  -0.93,-132.27)  310.91                80
 08/18/2013   22:34:16   (   0.33,-134.93) (  -0.24,-137.57)  300.57                80
 08/19/2013   22:18:12   (   0.33,-134.90) (   0.76,-133.04)  211.64                80
 08/21/2013   10:40:02   (  -0.33,-134.85) (   0.44,-138.31)  394.91                80
 08/22/2013   10:21:18   (  -0.33,-134.81) (  -0.56,-133.78)  117.06                80
 08/23/2013   22:40:36   (   0.34,-134.74) (  -0.67,-139.08)  495.01                80