Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 8 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/02/2017   22:40:06   (   0.26,-134.61) (  -0.68,-138.94)  492.69                80
 08/03/2017   22:24:02   (   0.26,-134.56) (   0.29,-134.40)   18.49                80
 08/06/2017   10:24:27   (  -0.27,-134.41) (  -0.10,-135.14)   83.06                80
 08/07/2017   10:08:23   (  -0.26,-134.36) (  -1.13,-130.62)  427.26                80
 08/08/2017   22:27:41   (   0.28,-134.30) (  -0.08,-135.92)  184.99                80
 08/09/2017   22:11:36   (   0.28,-134.24) (   0.89,-131.38)  325.44                80
 08/11/2017   10:30:45   (  -0.29,-134.14) (   0.28,-136.66)  287.37                80
 08/12/2017   10:14:41   (  -0.29,-134.08) (  -0.69,-132.12)  222.29                80
 08/13/2017   22:33:59   (   0.30,-133.99) (  -0.45,-137.44)  391.92                80
 08/14/2017   22:17:55   (   0.30,-133.93) (   0.53,-132.90)  117.56                80