Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 3 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/26/2015   10:32:51   (   0.01,-134.84) (   0.11,-135.17)   38.17                80
 03/27/2015   10:11:25   (   0.01,-134.80) (  -0.93,-130.64)  474.10                80
 03/28/2015   22:33:19   (  -0.01,-134.71) (  -0.25,-135.94)  139.30                80
 03/29/2015   22:17:13   (  -0.01,-134.68) (   0.73,-131.40)  373.14                80
 03/31/2015   10:38:58   (   0.01,-134.64) (   0.48,-136.66)  230.94                80
 04/01/2015   10:17:33   (   0.01,-134.60) (  -0.56,-132.14)  280.86                80
 04/02/2015   22:39:26   (  -0.01,-134.50) (  -0.67,-137.43)  333.84                80
 04/03/2015   22:23:20   (  -0.01,-134.46) (   0.32,-132.89)  178.03                80
 04/05/2015   10:45:06   (   0.01,-134.42) (   0.83,-138.16)  426.41                80
 04/06/2015   10:23:39   (   0.01,-134.37) (  -0.16,-133.62)   84.66                80