Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 4 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/24/2015   22:29:02   (  -0.06,-135.31) (   0.15,-134.37)  107.65                80
 04/26/2015   10:50:47   (   0.06,-135.39) (   1.01,-139.64)  484.27                80
 04/27/2015   10:29:21   (   0.07,-135.40) (  -0.01,-135.10)   34.66                80
 04/29/2015   22:32:27   (  -0.07,-135.40) (  -0.20,-135.86)   52.48                80
 04/30/2015   22:16:20   (  -0.07,-135.42) (   0.83,-131.32)  466.23                80
 05/02/2015   10:38:05   (   0.07,-135.48) (   0.31,-136.59)  126.69                80
 05/03/2015   10:16:39   (   0.07,-135.49) (  -0.72,-132.06)  391.45                80
 05/04/2015   22:38:31   (  -0.07,-135.46) (  -0.50,-137.35)  215.74                80
 05/05/2015   22:22:25   (  -0.07,-135.46) (   0.53,-132.82)  302.01                80
 05/07/2015   10:41:29   (   0.07,-135.51) (   0.66,-138.08)  292.31                80