Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 8 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)
 08/31/2018   10:12:08   (   0.40,-134.82) (  -0.21,-132.03)  317.71                80
 09/01/2018   22:34:05   (  -0.40,-134.88) (  -0.97,-137.34)  280.63                80
 09/02/2018   22:18:02   (  -0.40,-134.92) (   0.08,-132.82)  240.22                80
 09/04/2018   10:39:51   (   0.39,-135.00) (   1.06,-138.10)  352.71                80
 09/05/2018   10:18:27   (   0.39,-135.03) (   0.07,-133.56)  166.83                80
 09/06/2018   22:40:24   (  -0.38,-135.06) (  -1.24,-138.87)  434.42                80
 09/07/2018   22:24:21   (  -0.38,-135.09) (  -0.19,-134.35)   85.64                80
 09/10/2018   10:24:45   (   0.38,-135.20) (   0.35,-135.09)   12.17                80
 09/12/2018   22:27:58   (  -0.38,-135.25) (  -0.52,-135.87)   70.85                80