Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2012 7 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/20/2012   22:22:19   (   0.31,-135.36) (   0.52,-134.50)   98.27                80
 07/23/2012   10:25:23   (  -0.32,-135.35) (  -0.37,-135.25)   12.29                80
 07/25/2012   22:25:54   (   0.33,-135.32) (   0.17,-136.02)   80.41                80
 07/26/2012   22:09:49   (   0.33,-135.30) (   1.20,-131.49)  434.45                80
 07/28/2012   10:28:57   (  -0.35,-135.28) (  -0.04,-136.77)  168.93                80
 07/29/2012   10:12:52   (  -0.34,-135.26) (  -1.01,-132.23)  345.33                80
 07/30/2012   22:32:08   (   0.36,-135.22) (  -0.14,-137.54)  264.00                80
 07/31/2012   22:16:03   (   0.36,-135.20) (   0.83,-133.00)  250.24                80
 08/02/2012   10:35:11   (  -0.37,-135.18) (   0.31,-138.28)  353.31                80
 08/03/2012   10:19:06   (  -0.37,-135.16) (  -0.67,-133.74)  160.76                80