Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2014 9 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/10/2014   10:29:16   (   0.36,-134.80) (   0.07,-133.64)  132.69                80
 09/11/2014   22:48:35   (  -0.34,-134.85) (  -1.24,-138.95)  466.80                80
 09/12/2014   22:32:32   (  -0.35,-134.89) (  -0.26,-134.42)   53.39                80
 09/15/2014   10:33:00   (   0.34,-134.98) (   0.38,-135.17)   21.91                80
 09/16/2014   10:16:57   (   0.34,-135.01) (  -0.66,-130.65)  497.66                80
 09/17/2014   22:36:16   (  -0.32,-135.05) (  -0.50,-135.96)  103.25                80
 09/18/2014   22:20:13   (  -0.33,-135.08) (   0.49,-131.42)  416.29                80
 09/20/2014   10:39:23   (   0.30,-135.12) (   0.67,-136.70)  179.53                80
 09/21/2014   10:23:21   (   0.31,-135.15) (  -0.38,-132.18)  339.65                80
 09/22/2014   22:42:40   (  -0.29,-135.18) (  -0.78,-137.49)  262.34                80