Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 6 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/10/2015   22:44:49   (   0.03,-134.67) (  -0.96,-138.98)  491.28                80
 06/11/2015   22:28:44   (   0.02,-134.63) (   0.08,-134.46)   20.33                80
 06/14/2015   10:29:05   (  -0.03,-134.52) (   0.13,-135.19)   76.59                80
 06/15/2015   10:13:00   (  -0.03,-134.47) (  -0.85,-130.65)  434.37                80
 06/16/2015   22:32:16   (   0.05,-134.37) (  -0.31,-135.96)  181.01                80
 06/17/2015   22:16:10   (   0.04,-134.32) (   0.68,-131.43)  329.78                80
 06/19/2015   10:35:18   (  -0.06,-134.25) (   0.46,-136.71)  278.90                80
 06/20/2015   10:19:11   (  -0.05,-134.20) (  -0.47,-132.16)  231.74                80
 06/21/2015   22:38:28   (   0.06,-134.10) (  -0.69,-137.47)  384.26                80
 06/22/2015   22:22:22   (   0.05,-134.04) (   0.31,-132.94)  126.18                80
 06/24/2015   10:41:28   (  -0.07,-133.97) (   0.89,-138.20)  483.12                80