Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2012 4 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/12/2012   10:36:08   (   0.06,-134.19) (   0.96,-138.26)  464.09                80
 04/13/2012   10:20:02   (   0.06,-134.13) (  -0.03,-133.73)   46.09                80
 04/15/2012   22:20:32   (  -0.06,-134.01) (  -0.17,-134.49)   54.48                80
 04/16/2012   22:04:27   (  -0.07,-133.96) (   0.83,-129.96)  455.82                80
 04/18/2012   10:23:33   (   0.06,-133.83) (   0.39,-135.22)  158.33                80
 04/19/2012   10:07:27   (   0.06,-133.77) (  -0.62,-130.68)  351.50                80
 04/20/2012   22:26:43   (  -0.05,-133.70) (  -0.56,-135.99)  260.66                80
 04/21/2012   22:10:37   (  -0.05,-133.64) (   0.44,-131.45)  249.03                80
 04/23/2012   10:29:43   (   0.03,-133.51) (   0.76,-136.72)  365.70                80
 04/24/2012   10:13:38   (   0.04,-133.44) (  -0.25,-132.18)  143.35                80