Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 3 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/22/2013   22:29:26   (  -0.02,-135.26) (  -0.20,-136.09)   94.94                80
 03/23/2013   22:08:03   (  -0.01,-135.24) (   0.83,-131.57)  418.93                80
 03/25/2013   10:29:52   (   0.02,-135.23) (   0.36,-136.84)  182.14                80
 03/26/2013   10:13:49   (   0.01,-135.21) (  -0.66,-132.31)  331.41                80
 03/27/2013   22:35:45   (  -0.02,-135.14) (  -0.60,-137.60)  280.98                80
 03/28/2013   22:14:21   (  -0.01,-135.11) (   0.43,-133.07)  231.99                80
 03/30/2013   10:36:11   (   0.01,-135.09) (   0.76,-138.34)  370.78                80
 03/31/2013   10:20:07   (   0.01,-135.06) (  -0.27,-133.82)  141.68                80
 04/01/2013   22:42:05   (  -0.01,-134.98) (  -0.93,-139.12)  472.14                80
 04/02/2013   22:20:40   (  -0.01,-134.94) (   0.04,-134.58)   39.97                80