Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 8 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/17/2015   10:28:21   (  -0.29,-134.72) (  -0.19,-135.26)   60.53                80
 08/18/2015   10:12:15   (  -0.28,-134.69) (  -1.16,-130.71)  453.02                80
 08/19/2015   22:31:30   (   0.29,-134.68) (   0.02,-136.02)  152.63                80
 08/20/2015   22:15:23   (   0.29,-134.65) (   0.98,-131.48)  360.42                80
 08/22/2015   10:34:30   (  -0.30,-134.55) (   0.20,-136.75)  250.37                80
 08/23/2015   10:18:24   (  -0.30,-134.52) (  -0.82,-132.22)  262.18                80
 08/24/2015   22:37:38   (   0.31,-134.49) (  -0.37,-137.52)  344.81                80
 08/25/2015   22:21:33   (   0.31,-134.45) (   0.66,-132.99)  167.22                80
 08/27/2015   10:40:39   (  -0.32,-134.35) (   0.53,-138.26)  445.00                80
 08/28/2015   10:24:33   (  -0.32,-134.30) (  -0.44,-133.71)   66.67                80
 08/30/2015   22:25:02   (   0.32,-134.22) (   0.28,-134.48)   29.97                80