Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 7 31.  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) (  -0.20,-137.47)  228.35                80
 08/01/2018   22:17:54   (   0.26,-135.46) (   0.84,-132.94)  286.95                80
 08/03/2018   10:37:03   (  -0.28,-135.41) (   0.36,-138.21)  319.94                80
 08/04/2018   10:20:59   (  -0.27,-135.39) (  -0.68,-133.69)  194.66                80
 08/05/2018   22:40:17   (   0.30,-135.39) (  -0.53,-138.99)  410.87                80
 08/06/2018   22:24:13   (   0.29,-135.37) (   0.52,-134.47)  103.31                80
 08/09/2018   10:24:37   (  -0.31,-135.28) (  -0.30,-135.20)    9.00                80
 08/11/2018   22:27:51   (   0.32,-135.23) (   0.15,-135.98)   85.31                80
 08/12/2018   22:11:46   (   0.31,-135.20) (   1.13,-131.44)  428.10                80
 08/14/2018   10:30:56   (  -0.33,-135.14) (   0.01,-136.72)  180.67                80