Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2013 4 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/13/2013   22:17:13   (  -0.04,-134.84) (   0.35,-133.07)  201.63                80
 04/15/2013   10:39:02   (   0.04,-134.87) (   0.81,-138.35)  396.63                80
 04/16/2013   10:17:38   (   0.05,-134.88) (  -0.18,-133.81)  121.58                80
 04/17/2013   22:39:35   (  -0.04,-134.91) (  -1.00,-139.12)  479.68                80
 04/18/2013   22:23:32   (  -0.05,-134.93) (   0.05,-134.60)   38.39                80
 04/21/2013   10:23:55   (   0.05,-134.95) (   0.16,-135.32)   43.22                80
 04/22/2013   10:07:52   (   0.05,-134.96) (  -0.89,-130.80)  474.38                80
 04/23/2013   22:27:09   (  -0.05,-134.98) (  -0.28,-136.11)  128.28                80
 04/24/2013   22:11:05   (  -0.05,-134.98) (   0.72,-131.57)  388.79                80
 04/26/2013   10:30:13   (   0.04,-134.98) (   0.48,-136.84)  211.94                80