Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 8 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/03/2018   10:37:03   (  -0.28,-135.41) (   0.33,-138.22)  319.85                80
 08/04/2018   10:20:59   (  -0.27,-135.39) (  -0.65,-133.68)  194.77                80
 08/05/2018   22:40:17   (   0.30,-135.39) (  -0.49,-139.00)  410.49                80
 08/06/2018   22:24:13   (   0.29,-135.37) (   0.49,-134.46)  103.70                80
 08/09/2018   10:27:17   (  -0.31,-135.28) (  -0.33,-135.20)    8.80                80
 08/11/2018   22:27:51   (   0.32,-135.24) (   0.18,-135.98)   84.77                80
 08/12/2018   22:11:47   (   0.31,-135.21) (   1.16,-131.45)  428.68                80
 08/14/2018   10:30:55   (  -0.33,-135.14) (   0.04,-136.72)  180.25                80
 08/15/2018   10:14:52   (  -0.33,-135.11) (  -1.00,-132.19)  332.83                80
 08/16/2018   22:34:09   (   0.35,-135.08) (  -0.19,-137.50)  274.94                80