Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 5 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/13/2015   10:31:55   (   0.05,-135.43) (  -0.00,-135.14)   32.70                80
 05/15/2015   22:32:27   (  -0.05,-135.36) (  -0.16,-135.92)   63.62                80
 05/16/2015   22:16:22   (  -0.05,-135.35) (   0.81,-131.38)  451.14                80
 05/18/2015   10:35:30   (   0.04,-135.36) (   0.33,-136.67)  148.74                80
 05/19/2015   10:19:25   (   0.04,-135.34) (  -0.70,-132.14)  365.65                80
 05/20/2015   22:38:41   (  -0.03,-135.28) (  -0.54,-137.44)  246.80                80
 05/21/2015   22:22:36   (  -0.04,-135.26) (   0.49,-132.91)  267.49                80
 05/23/2015   10:41:44   (   0.03,-135.27) (   0.69,-138.19)  332.88                80
 05/24/2015   10:25:39   (   0.04,-135.25) (  -0.35,-133.66)  181.22                80
 05/25/2015   22:44:54   (  -0.03,-135.17) (  -0.88,-138.96)  431.94                80