Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 8 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/07/2015   10:18:41   (  -0.25,-134.98) (  -0.85,-132.24)  311.40                80
 08/08/2015   22:37:56   (   0.26,-134.97) (  -0.31,-137.55)  293.99                80
 08/09/2015   22:21:51   (   0.26,-134.95) (   0.71,-133.02)  220.21                80
 08/11/2015   10:40:57   (  -0.28,-134.88) (   0.48,-138.29)  387.56                80
 08/12/2015   10:24:52   (  -0.27,-134.86) (  -0.54,-133.76)  126.54                80
 08/13/2015   22:44:06   (   0.29,-134.85) (  -0.66,-139.05)  479.22                80
 08/14/2015   22:28:00   (   0.28,-134.83) (   0.36,-134.52)   34.64                80
 08/17/2015   10:28:21   (  -0.29,-134.73) (  -0.19,-135.26)   60.12                80
 08/18/2015   10:12:15   (  -0.28,-134.70) (  -1.15,-130.72)  453.47                80
 08/19/2015   22:31:30   (   0.30,-134.68) (   0.02,-136.03)  153.07                80