Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2014 9 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/20/2014   10:39:12   (   0.30,-135.13) (   0.65,-136.69)  176.68                80
 09/21/2014   10:23:08   (   0.31,-135.16) (  -0.35,-132.15)  342.76                80
 09/22/2014   22:42:25   (  -0.29,-135.20) (  -0.82,-137.46)  257.89                80
 09/23/2014   22:26:21   (  -0.30,-135.23) (   0.18,-132.92)  261.58                80
 09/25/2014   10:45:30   (   0.28,-135.26) (   0.92,-138.21)  335.42                80
 09/26/2014   10:29:26   (   0.29,-135.28) (  -0.09,-133.67)  183.40                80
 09/27/2014   22:48:43   (  -0.27,-135.30) (  -1.08,-138.98)  419.06                80
 09/28/2014   22:32:38   (  -0.28,-135.32) (  -0.07,-134.45)   99.45                80
 09/30/2014   10:51:47   (   0.25,-135.34) (   1.22,-139.72)  498.68                80
 10/01/2014   10:35:42   (   0.26,-135.35) (   0.21,-135.19)   19.08                80