Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 4 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/05/2013   10:23:45   (   0.03,-134.89) (   0.11,-135.32)   48.76                80
 04/06/2013   10:07:41   (   0.03,-134.85) (  -0.86,-130.79)  463.39                80
 04/07/2013   22:29:38   (  -0.04,-134.78) (  -0.33,-136.09)  149.71                80
 04/08/2013   22:08:15   (  -0.03,-134.74) (   0.71,-131.56)  362.17                80
 04/10/2013   10:30:03   (   0.03,-134.69) (   0.53,-136.82)  243.28                80
 04/11/2013   10:14:00   (   0.03,-134.65) (  -0.51,-132.30)  268.32                80
 04/12/2013   22:35:56   (  -0.03,-134.56) (  -0.73,-137.59)  345.64                80
 04/13/2013   22:14:32   (  -0.03,-134.52) (   0.31,-133.07)  165.59                80
 04/15/2013   10:36:21   (   0.04,-134.46) (   0.92,-138.33)  440.95                80
 04/16/2013   10:20:17   (   0.04,-134.41) (  -0.12,-133.80)   70.04                80