Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 3 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/16/2013   22:41:50   (   0.00,-135.36) (  -0.85,-139.10)  427.08                80
 03/17/2013   22:20:27   (   0.00,-135.35) (   0.17,-134.58)   88.08                80
 03/20/2013   10:26:13   (  -0.00,-135.37) (   0.00,-135.32)    5.18                80
 03/22/2013   22:29:26   (  -0.00,-135.29) (  -0.19,-136.09)   91.77                80
 03/23/2013   22:08:03   (  -0.00,-135.27) (   0.84,-131.57)  422.64                80
 03/25/2013   10:29:52   (   0.00,-135.29) (   0.35,-136.84)  176.62                80
 03/26/2013   10:13:49   (   0.00,-135.27) (  -0.68,-132.31)  337.51                80
 03/27/2013   22:35:46   (  -0.00,-135.20) (  -0.51,-137.62)  275.00                80
 03/28/2013   22:14:22   (   0.00,-135.17) (   0.46,-133.08)  238.58                80