Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 4 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/29/2015   22:32:27   (  -0.07,-135.41) (  -0.18,-135.86)   51.74                80
 04/30/2015   22:16:21   (  -0.07,-135.42) (   0.84,-131.32)  466.91                80
 05/02/2015   10:38:06   (   0.07,-135.49) (   0.31,-136.59)  126.29                80
 05/03/2015   10:16:39   (   0.07,-135.50) (  -0.71,-132.06)  391.85                80
 05/04/2015   22:38:33   (  -0.07,-135.47) (  -0.47,-137.36)  215.13                80
 05/05/2015   22:22:25   (  -0.07,-135.47) (   0.50,-132.81)  302.60                80
 05/07/2015   10:41:31   (   0.07,-135.52) (   0.65,-138.08)  292.07                80
 05/08/2015   10:25:24   (   0.07,-135.52) (  -0.38,-133.55)  225.14                80
 05/09/2015   22:44:37   (  -0.07,-135.48) (  -0.79,-138.85)  383.38                80
 05/10/2015   22:28:30   (  -0.07,-135.48) (   0.18,-134.30)  133.51                80