Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 10 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/20/2015   10:27:14   (   0.18,-134.55) (   0.27,-135.12)   63.78                80
 10/21/2015   10:11:08   (   0.19,-134.51) (  -0.67,-130.57)  447.81                80
 10/22/2015   22:30:24   (  -0.16,-134.45) (  -0.48,-135.89)  164.32                80
 10/23/2015   22:14:19   (  -0.17,-134.40) (   0.52,-131.36)  347.37                80
 10/25/2015   10:33:25   (   0.14,-134.32) (   0.66,-136.62)  262.89                80
 10/26/2015   10:17:20   (   0.16,-134.27) (  -0.35,-132.09)  248.04                80
 10/27/2015   22:36:35   (  -0.13,-134.19) (  -0.86,-137.40)  366.10                80
 10/28/2015   22:20:29   (  -0.14,-134.13) (   0.15,-132.86)  144.95                80
 10/30/2015   10:39:36   (   0.11,-134.05) (   1.03,-138.13)  465.38                80
 10/31/2015   10:23:30   (   0.13,-133.99) (   0.02,-133.60)   44.85                80
 11/02/2015   22:24:00   (  -0.11,-133.83) (  -0.20,-134.37)   60.77                80