Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2012 6 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/18/2012   22:22:22   (   0.16,-134.93) (   0.28,-134.44)   56.59                80
 06/21/2012   10:22:40   (  -0.17,-134.81) (  -0.07,-135.16)   40.27                80
 06/22/2012   10:06:35   (  -0.16,-134.77) (  -1.11,-130.63)  472.28                80
 06/23/2012   22:25:49   (   0.18,-134.72) (  -0.06,-135.93)  137.01                80
 06/24/2012   22:09:43   (   0.17,-134.68) (   0.93,-131.39)  375.48                80
 06/26/2012   10:28:48   (  -0.20,-134.59) (   0.26,-136.65)  234.80                80
 06/27/2012   10:12:42   (  -0.19,-134.54) (  -0.74,-132.11)  276.92                80
 06/28/2012   22:31:56   (   0.21,-134.47) (  -0.42,-137.41)  334.21                80
 06/29/2012   22:15:48   (   0.21,-134.42) (   0.53,-132.86)  177.27                80
 07/01/2012   10:34:55   (  -0.23,-134.32) (   0.60,-138.13)  434.03                80
 07/02/2012   10:18:48   (  -0.23,-134.26) (  -0.40,-133.59)   76.77                80