Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2012 8 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)
 08/20/2012   22:38:07   (  -0.43,-134.61) (  -1.39,-138.86)  484.68                80
 08/21/2012   22:22:03   (  -0.43,-134.57) (  -0.36,-134.34)   27.35                80
 08/24/2012   10:25:05   (   0.42,-134.46) (   0.53,-135.07)   69.43                80
 08/25/2012   10:03:40   (   0.42,-134.41) (  -0.43,-130.53)  441.27                80
 08/26/2012   22:25:36   (  -0.41,-134.33) (  -0.75,-135.84)  172.59                80
 08/27/2012   22:09:32   (  -0.41,-134.28) (   0.27,-131.31)  338.43                80
 08/29/2012   10:31:19   (   0.40,-134.21) (   0.93,-136.58)  269.92                80
 08/30/2012   10:09:55   (   0.40,-134.16) (  -0.09,-132.05)  240.51                80
 08/31/2012   22:31:51   (  -0.39,-134.06) (  -1.11,-137.35)  374.92                80
 09/01/2012   22:15:45   (  -0.40,-134.01) (  -0.15,-132.81)  135.97                80