Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 3 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/15/2013   10:17:13   (  -0.01,-135.41) (  -0.39,-133.81)  183.57                80
 03/16/2013   22:41:51   (   0.01,-135.36) (  -0.83,-139.11)  427.01                80
 03/17/2013   22:20:27   (   0.01,-135.35) (   0.19,-134.58)   88.15                80
 03/20/2013   10:26:13   (  -0.00,-135.37) (  -0.02,-135.32)    5.33                80
 03/22/2013   22:29:27   (  -0.00,-135.29) (  -0.17,-136.10)   91.70                80
 03/23/2013   22:08:03   (  -0.00,-135.28) (   0.86,-131.57)  422.75                80
 03/25/2013   10:29:53   (   0.00,-135.29) (   0.33,-136.84)  176.33                80
 03/26/2013   10:13:48   (   0.00,-135.27) (  -0.64,-132.31)  337.83                80
 03/27/2013   22:35:45   (  -0.00,-135.20) (  -0.55,-137.61)  274.88                80