Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 5 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)
 05/07/2013   10:26:46   (   0.03,-135.41) (  -0.01,-135.36)    7.09                80
 05/09/2013   22:27:19   (  -0.02,-135.42) (  -0.16,-136.13)   80.71                80
 05/10/2013   22:11:15   (  -0.02,-135.42) (   0.85,-131.59)  436.45                80
 05/12/2013   10:30:23   (   0.01,-135.43) (   0.32,-136.86)  162.63                80
 05/13/2013   10:14:19   (   0.02,-135.43) (  -0.69,-132.33)  354.03                80
 05/14/2013   22:33:36   (  -0.01,-135.42) (  -0.48,-137.64)  251.77                80
 05/15/2013   22:17:31   (  -0.02,-135.42) (   0.53,-133.10)  264.83                80
 05/17/2013   10:36:39   (   0.01,-135.43) (   0.68,-138.36)  334.79                80
 05/18/2013   10:20:34   (   0.01,-135.42) (  -0.33,-133.83)  181.33                80
 05/19/2013   22:39:52   (  -0.00,-135.40) (  -0.83,-139.14)  425.85                80