Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 7 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/29/2018   10:30:45   (  -0.26,-135.46) (   0.01,-136.69)  139.73                80
 07/30/2018   10:14:40   (  -0.25,-135.45) (  -0.97,-132.16)  375.59                80
 07/31/2018   22:33:58   (   0.27,-135.46) (  -0.18,-137.47)  228.86                80
 08/01/2018   22:17:54   (   0.26,-135.45) (   0.80,-132.94)  286.36                80
 08/03/2018   10:37:03   (  -0.28,-135.41) (   0.34,-138.22)  320.00                80
 08/04/2018   10:20:59   (  -0.28,-135.39) (  -0.64,-133.68)  194.50                80
 08/05/2018   22:40:17   (   0.30,-135.38) (  -0.50,-139.00)  411.77                80
 08/06/2018   22:24:13   (   0.29,-135.36) (   0.48,-134.46)  102.32                80
 08/09/2018   10:27:13   (  -0.31,-135.27) (  -0.32,-135.20)    8.05                76