Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 9 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/02/2018   22:18:02   (  -0.39,-134.94) (   0.09,-132.82)  242.44                80
 09/04/2018   10:39:50   (   0.39,-135.01) (   1.11,-138.08)  351.22                80
 09/05/2018   10:18:27   (   0.39,-135.04) (   0.06,-133.56)  168.70                80
 09/06/2018   22:40:24   (  -0.38,-135.09) (  -1.23,-138.87)  430.66                80
 09/07/2018   22:24:21   (  -0.38,-135.13) (  -0.18,-134.35)   89.80                80
 09/10/2018   10:24:46   (   0.38,-135.23) (   0.33,-135.09)   16.05                80
 09/12/2018   22:27:58   (  -0.38,-135.30) (  -0.50,-135.87)   64.77                80
 09/13/2018   22:11:54   (  -0.38,-135.33) (   0.49,-131.33)  455.34                80
 09/15/2018   10:33:43   (   0.37,-135.40) (   0.65,-136.61)  138.68                80
 09/16/2018   10:12:20   (   0.37,-135.42) (  -0.40,-132.09)  380.35                80