Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 8 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/24/2015   22:37:29   (  -0.39,-134.92) (  -0.94,-137.39)  281.41                80
 08/25/2015   22:21:23   (  -0.38,-134.95) (   0.09,-132.86)  238.43                80
 08/27/2015   10:43:10   (   0.38,-134.97) (   1.09,-138.13)  359.71                80
 08/28/2015   10:21:44   (   0.38,-135.00) (   0.06,-133.60)  159.50                80
 08/29/2015   22:43:38   (  -0.37,-135.05) (  -1.26,-138.90)  438.78                80
 08/30/2015   22:27:33   (  -0.38,-135.08) (  -0.23,-134.37)   80.50                80
 09/02/2015   10:27:54   (   0.37,-135.11) (   0.37,-135.11)    0.54                80
 09/04/2015   22:31:03   (  -0.37,-135.17) (  -0.53,-135.88)   80.76                80
 09/05/2015   22:14:57   (  -0.37,-135.19) (   0.50,-131.35)  437.72                80