Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 11 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/20/2018   09:53:15   (   0.09,-128.26) (  -0.10,-127.36)  102.39                80
 11/22/2018   21:59:07   (  -0.07,-128.23) (  -0.08,-128.14)   10.31                80
 11/25/2018   09:59:30   (   0.07,-128.39) (   0.19,-128.89)   57.11                80
 11/26/2018   09:43:26   (   0.08,-128.41) (  -0.83,-124.36)  461.30                80
 11/27/2018   22:02:42   (  -0.05,-128.33) (  -0.37,-129.67)  153.06                80
 11/28/2018   21:46:38   (  -0.06,-128.35) (   0.66,-125.14)  365.54                80
 11/30/2018   10:05:46   (   0.03,-128.49) (   0.48,-130.42)  220.87                80
 12/01/2018   09:49:42   (   0.05,-128.50) (  -0.54,-125.89)  297.21                80
 12/02/2018   22:08:58   (  -0.02,-128.41) (  -0.65,-131.20)  318.36                80