Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 5 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/20/2015   22:38:41   (  -0.03,-135.33) (  -0.52,-137.44)  240.89                80
 05/21/2015   22:22:37   (  -0.04,-135.32) (   0.51,-132.92)  273.70                80
 05/23/2015   10:41:44   (   0.03,-135.31) (   0.67,-138.19)  327.95                80
 05/24/2015   10:25:38   (   0.03,-135.30) (  -0.30,-133.65)  186.54                80
 05/25/2015   22:44:55   (  -0.02,-135.25) (  -0.88,-138.96)  424.20                80
 05/26/2015   22:28:50   (  -0.03,-135.23) (   0.16,-134.44)   89.97                80
 05/29/2015   10:29:12   (   0.02,-135.19) (   0.04,-135.18)    2.67                80
 05/31/2015   22:32:24   (  -0.01,-135.11) (  -0.18,-135.96)   97.22                80
 06/01/2015   22:16:19   (  -0.02,-135.08) (   0.80,-131.43)  415.95                80