Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 6 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/04/2015   10:19:21   (   0.00,-134.96) (  -0.64,-132.17)  319.13                80
 06/05/2015   22:38:37   (   0.01,-134.89) (  -0.54,-137.48)  294.24                80
 06/06/2015   22:22:31   (   0.00,-134.85) (   0.44,-132.94)  217.86                80
 06/08/2015   10:41:39   (  -0.02,-134.80) (   0.72,-138.22)  388.68                80
 06/09/2015   10:25:33   (  -0.01,-134.76) (  -0.26,-133.68)  123.07                80
 06/10/2015   22:44:50   (   0.03,-134.67) (  -0.92,-138.99)  491.39                80
 06/11/2015   22:28:44   (   0.02,-134.63) (   0.07,-134.45)   20.03                80
 06/14/2015   10:29:06   (  -0.03,-134.52) (   0.11,-135.19)   76.51                80
 06/15/2015   10:13:01   (  -0.02,-134.47) (  -0.87,-130.66)  434.39                80
 06/16/2015   22:32:17   (   0.04,-134.38) (  -0.30,-135.97)  181.31                80