Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 8 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/02/2015   10:12:31   (  -0.22,-135.06) (  -1.21,-130.74)  493.22                80
 08/03/2015   22:31:46   (   0.24,-135.06) (   0.05,-136.05)  111.64                80
 08/04/2015   22:15:40   (   0.23,-135.05) (   1.01,-131.50)  403.33                80
 08/06/2015   10:34:47   (  -0.25,-135.00) (   0.13,-136.78)  203.00                80
 08/07/2015   10:18:41   (  -0.25,-134.98) (  -0.83,-132.24)  311.66                80
 08/08/2015   22:37:56   (   0.26,-134.97) (  -0.32,-137.55)  293.98                80
 08/09/2015   22:21:51   (   0.26,-134.95) (   0.70,-133.02)  220.21                80
 08/11/2015   10:40:57   (  -0.28,-134.89) (   0.50,-138.28)  387.33                80
 08/12/2015   10:24:51   (  -0.27,-134.87) (  -0.52,-133.75)  126.75                80
 08/13/2015   22:44:07   (   0.29,-134.85) (  -0.63,-139.06)  479.19                80
 08/14/2015   22:28:00   (   0.28,-134.83) (   0.34,-134.52)   34.69                80