Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 4 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/15/2013   10:39:02   (   0.04,-134.87) (   0.80,-138.35)  396.64                80
 04/16/2013   10:17:38   (   0.05,-134.88) (  -0.18,-133.81)  121.56                80
 04/17/2013   22:39:35   (  -0.04,-134.91) (  -0.99,-139.12)  479.71                80
 04/18/2013   22:23:32   (  -0.05,-134.93) (   0.05,-134.60)   38.36                80
 04/21/2013   10:26:37   (   0.05,-134.95) (   0.11,-135.34)   43.27                80
 04/22/2013   10:07:52   (   0.05,-134.96) (  -0.88,-130.80)  474.28                80
 04/23/2013   22:27:09   (  -0.05,-134.98) (  -0.29,-136.11)  128.38                80
 04/24/2013   22:11:05   (  -0.05,-134.98) (   0.70,-131.57)  388.64                80
 04/26/2013   10:30:14   (   0.04,-134.98) (   0.44,-136.85)  212.13                80
 04/27/2013   10:14:10   (   0.04,-134.98) (  -0.56,-132.31)  304.27                80