Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 5 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/07/2015   10:41:45   (   0.05,-135.46) (   0.64,-138.14)  306.02                80
 05/08/2015   10:25:41   (   0.05,-135.45) (  -0.37,-133.62)  209.69                80
 05/09/2015   22:44:57   (  -0.05,-135.41) (  -0.82,-138.92)  400.46                80
 05/10/2015   22:28:53   (  -0.05,-135.40) (   0.20,-134.40)  115.03                80
 05/12/2015   10:48:00   (   0.05,-135.42) (   1.01,-139.67)  483.77                80
 05/13/2015   10:31:55   (   0.05,-135.41) (  -0.01,-135.14)   31.30                80
 05/15/2015   22:32:27   (  -0.05,-135.35) (  -0.15,-135.92)   65.28                80
 05/16/2015   22:16:22   (  -0.05,-135.33) (   0.81,-131.39)  449.41                80
 05/18/2015   10:35:30   (   0.04,-135.35) (   0.33,-136.67)  150.60                80
 05/19/2015   10:19:26   (   0.04,-135.33) (  -0.70,-132.14)  363.69                80