Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2012 7 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/23/2012   10:22:42   (  -0.32,-135.35) (  -0.32,-135.24)   11.92                80
 07/25/2012   22:25:54   (   0.33,-135.31) (   0.17,-136.02)   80.88                80
 07/26/2012   22:09:49   (   0.33,-135.30) (   1.20,-131.49)  433.91                80
 07/28/2012   10:28:58   (  -0.35,-135.28) (  -0.04,-136.77)  169.71                80
 07/29/2012   10:12:52   (  -0.34,-135.25) (  -1.01,-132.23)  344.47                80
 07/30/2012   22:32:08   (   0.36,-135.21) (  -0.15,-137.54)  264.83                80
 07/31/2012   22:16:03   (   0.36,-135.19) (   0.82,-133.00)  249.34                80
 08/02/2012   10:35:11   (  -0.37,-135.17) (   0.33,-138.28)  354.47                80
 08/03/2012   10:19:07   (  -0.37,-135.15) (  -0.70,-133.75)  159.53                80