Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 12 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/04/2015   22:26:36   (   0.02,-135.40) (   0.21,-134.52)  100.66                80
 12/06/2015   10:45:44   (  -0.04,-135.41) (   0.91,-139.80)  499.68                80
 12/07/2015   10:29:39   (  -0.03,-135.40) (  -0.08,-135.27)   15.63                80
 12/09/2015   22:30:08   (   0.04,-135.33) (  -0.11,-136.04)   79.94                80
 12/10/2015   22:14:03   (   0.02,-135.32) (   0.88,-131.50)  434.91                80
 12/12/2015   10:33:10   (  -0.04,-135.31) (   0.29,-136.77)  166.75                80
 12/13/2015   10:17:05   (  -0.03,-135.29) (  -0.70,-132.24)  347.27                80
 12/14/2015   22:36:20   (   0.05,-135.22) (  -0.47,-137.55)  265.22                80
 12/15/2015   22:20:15   (   0.04,-135.19) (   0.52,-133.01)  248.69                80
 12/17/2015   10:39:22   (  -0.06,-135.19) (   0.65,-138.28)  353.57                80
 12/18/2015   10:23:16   (  -0.05,-135.15) (  -0.35,-133.75)  159.71                80