Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 7 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/29/2017   22:17:43   (   0.22,-134.80) (   0.66,-132.88)  218.28                80
 07/31/2017   10:36:52   (  -0.25,-134.70) (   0.50,-138.16)  393.22                80
 08/01/2017   10:20:48   (  -0.24,-134.66) (  -0.47,-133.62)  118.13                80
 08/02/2017   22:40:06   (   0.26,-134.61) (  -0.69,-138.94)  492.40                80
 08/03/2017   22:24:02   (   0.26,-134.57) (   0.28,-134.40)   18.92                80
 08/06/2017   10:24:27   (  -0.27,-134.42) (  -0.09,-135.14)   82.49                80
 08/07/2017   10:08:23   (  -0.26,-134.37) (  -1.12,-130.61)  427.97                80
 08/08/2017   22:27:40   (   0.28,-134.31) (  -0.09,-135.92)  184.06                80
 08/09/2017   22:11:37   (   0.28,-134.25) (   0.94,-131.39)  326.48                80
 08/11/2017   10:30:45   (  -0.29,-134.15) (   0.28,-136.66)  286.27                80
 08/12/2017   10:14:42   (  -0.29,-134.09) (  -0.75,-132.13)  223.50                80