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)
 08/30/2018   10:33:33   (   0.40,-134.78) (   0.77,-136.57)  202.78                80
 08/31/2018   10:12:08   (   0.40,-134.83) (  -0.22,-132.03)  318.06                80
 09/01/2018   22:34:05   (  -0.40,-134.89) (  -0.96,-137.34)  279.61                80
 09/02/2018   22:18:02   (  -0.39,-134.93) (   0.09,-132.82)  241.40                80
 09/04/2018   10:39:51   (   0.39,-135.01) (   1.06,-138.10)  351.70                80
 09/05/2018   10:18:27   (   0.39,-135.04) (   0.07,-133.56)  168.02                80
 09/06/2018   22:40:24   (  -0.38,-135.08) (  -1.24,-138.87)  432.56                80
 09/07/2018   22:24:21   (  -0.38,-135.11) (  -0.19,-134.35)   87.68                80
 09/10/2018   10:24:45   (   0.38,-135.21) (   0.34,-135.09)   14.21                80
 09/12/2018   22:27:58   (  -0.38,-135.27) (  -0.51,-135.87)   67.97                80