Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 5 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/15/2015   22:32:27   (  -0.05,-135.36) (  -0.18,-135.92)   63.24                80
 05/16/2015   22:16:22   (  -0.05,-135.35) (   0.85,-131.39)  451.53                80
 05/18/2015   10:35:30   (   0.04,-135.37) (   0.34,-136.66)  148.17                80
 05/19/2015   10:19:25   (   0.04,-135.35) (  -0.69,-132.14)  366.23                80
 05/20/2015   22:38:41   (  -0.03,-135.28) (  -0.49,-137.45)  246.32                80
 05/21/2015   22:22:36   (  -0.04,-135.26) (   0.48,-132.91)  268.01                80
 05/23/2015   10:41:43   (   0.03,-135.27) (   0.70,-138.18)  332.14                80
 05/24/2015   10:25:39   (   0.04,-135.25) (  -0.33,-133.66)  181.97                80
 05/25/2015   22:44:54   (  -0.03,-135.18) (  -0.90,-138.96)  431.34                80
 05/26/2015   22:28:50   (  -0.03,-135.16) (   0.14,-134.44)   82.59                80