Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2012 6 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/13/2012   22:16:12   (   0.12,-135.10) (   0.57,-132.94)  245.62                80
 06/15/2012   10:35:19   (  -0.15,-135.06) (   0.56,-138.21)  359.86                80
 06/16/2012   10:19:12   (  -0.14,-135.02) (  -0.42,-133.67)  153.83                80
 06/17/2012   22:38:27   (   0.17,-134.97) (  -0.76,-138.97)  456.06                80
 06/18/2012   22:22:21   (   0.16,-134.94) (   0.30,-134.44)   57.60                80
 06/21/2012   10:22:40   (  -0.17,-134.85) (  -0.11,-135.16)   35.49                80
 06/22/2012   10:06:33   (  -0.16,-134.81) (  -1.11,-130.62)  477.44                80
 06/23/2012   22:25:47   (   0.19,-134.75) (  -0.10,-135.91)  133.68                80
 06/24/2012   22:09:40   (   0.17,-134.71) (   0.91,-131.38)  379.27                80
 06/26/2012   10:28:46   (  -0.20,-134.64) (   0.26,-136.64)  227.69                80
 06/27/2012   10:12:39   (  -0.19,-134.60) (  -0.75,-132.10)  284.55                80