Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 7 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/31/2018   22:33:58   (   0.27,-135.47) (  -0.18,-137.47)  228.50                80
 08/01/2018   22:17:54   (   0.26,-135.46) (   0.80,-132.93)  286.76                80
 08/03/2018   10:37:03   (  -0.28,-135.41) (   0.34,-138.21)  319.96                80
 08/04/2018   10:20:59   (  -0.27,-135.39) (  -0.64,-133.68)  194.58                80
 08/05/2018   22:40:17   (   0.30,-135.39) (  -0.50,-138.99)  411.22                80
 08/06/2018   22:24:13   (   0.29,-135.36) (   0.48,-134.46)  102.92                80
 08/09/2018   10:27:17   (  -0.31,-135.28) (  -0.32,-135.20)    8.32                80
 08/11/2018   22:27:51   (   0.32,-135.23) (   0.16,-135.98)   85.91                80
 08/12/2018   22:11:47   (   0.31,-135.20) (   1.15,-131.45)  427.45                80