Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 3 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/29/2015   22:17:13   (  -0.02,-134.67) (   0.73,-131.40)  373.21                80
 03/31/2015   10:38:58   (   0.02,-134.63) (   0.47,-136.66)  231.31                80
 04/01/2015   10:17:32   (   0.02,-134.59) (  -0.52,-132.13)  280.48                80
 04/02/2015   22:39:26   (  -0.02,-134.50) (  -0.65,-137.43)  333.76                80
 04/03/2015   22:23:20   (  -0.02,-134.45) (   0.34,-132.89)  178.11                80
 04/05/2015   10:45:05   (   0.02,-134.41) (   0.86,-138.15)  426.75                80
 04/06/2015   10:23:39   (   0.02,-134.36) (  -0.13,-133.62)   84.33                80
 04/08/2015   22:26:45   (  -0.02,-134.20) (  -0.08,-134.37)   20.89                80
 04/09/2015   22:10:39   (  -0.01,-134.14) (   0.92,-129.84)  490.03                80
 04/11/2015   10:32:24   (   0.02,-134.08) (   0.27,-135.10)  116.32                80