Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2014 9 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)
 09/21/2014   10:23:08   (   0.31,-135.16) (  -0.34,-132.15)  342.40                80
 09/22/2014   22:42:26   (  -0.29,-135.20) (  -0.78,-137.47)  258.39                80
 09/23/2014   22:26:22   (  -0.30,-135.22) (   0.22,-132.93)  261.00                80
 09/25/2014   10:45:30   (   0.28,-135.26) (   0.94,-138.20)  335.97                80
 09/26/2014   10:29:25   (   0.29,-135.27) (  -0.06,-133.67)  182.77                80
 09/27/2014   22:48:43   (  -0.27,-135.30) (  -1.11,-138.97)  419.86                80
 09/28/2014   22:32:38   (  -0.28,-135.31) (  -0.11,-134.44)   98.62                80
 09/30/2014   10:51:48   (   0.25,-135.34) (   1.21,-139.73)  499.57                80
 10/01/2014   10:35:43   (   0.26,-135.35) (   0.20,-135.19)   18.26                80
 10/03/2014   22:36:16   (  -0.24,-135.36) (  -0.36,-135.97)   69.13                80
 10/04/2014   22:20:11   (  -0.25,-135.36) (   0.65,-131.43)  448.37                80