Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2012 7 22.  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   10:25:23   (  -0.32,-135.35) (  -0.37,-135.25)   11.99                80
 07/25/2012   22:25:54   (   0.33,-135.31) (   0.16,-136.02)   80.88                80
 07/26/2012   22:09:49   (   0.33,-135.30) (   1.18,-131.49)  433.89                80
 07/28/2012   10:28:58   (  -0.35,-135.28) (  -0.01,-136.76)  169.75                80
 07/29/2012   10:12:53   (  -0.34,-135.26) (  -1.03,-132.24)  344.37                80
 07/30/2012   22:32:09   (   0.36,-135.22) (  -0.14,-137.55)  265.00                80
 07/31/2012   22:16:04   (   0.36,-135.19) (   0.83,-133.00)  249.12                80
 08/02/2012   10:35:12   (  -0.37,-135.17) (   0.33,-138.28)  354.76                80
 08/03/2012   10:19:08   (  -0.37,-135.15) (  -0.69,-133.75)  159.17                80
 08/04/2012   22:38:23   (   0.38,-135.10) (  -0.53,-139.05)  450.64                80