Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 6 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/09/2015   10:25:33   (  -0.01,-134.76) (  -0.24,-133.67)  123.03                80
 06/10/2015   22:44:49   (   0.03,-134.67) (  -0.93,-138.99)  491.22                80
 06/11/2015   22:28:44   (   0.02,-134.63) (   0.05,-134.45)   20.22                80
 06/14/2015   10:29:06   (  -0.03,-134.52) (   0.11,-135.19)   76.40                80
 06/15/2015   10:13:00   (  -0.03,-134.47) (  -0.88,-130.66)  434.52                80
 06/16/2015   22:32:16   (   0.04,-134.38) (  -0.29,-135.97)  180.98                80
 06/17/2015   22:16:11   (   0.04,-134.32) (   0.70,-131.43)  329.83                80
 06/19/2015   10:35:17   (  -0.05,-134.25) (   0.50,-136.70)  278.76                80
 06/20/2015   10:19:12   (  -0.04,-134.20) (  -0.49,-132.16)  231.85                80
 06/21/2015   22:38:28   (   0.06,-134.10) (  -0.67,-137.48)  384.25                80
 06/22/2015   22:22:23   (   0.05,-134.04) (   0.32,-132.94)  126.21                80