Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 10 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/11/2018   10:43:40   (   0.26,-135.64) (   1.15,-139.70)  461.74                80
 10/12/2018   10:24:55   (   0.27,-135.63) (   0.18,-135.16)   53.67                80
 10/14/2018   22:28:06   (  -0.26,-135.56) (  -0.31,-135.95)   42.83                80
 10/15/2018   22:12:01   (  -0.27,-135.55) (   0.66,-131.41)  472.66                80
 10/17/2018   10:31:09   (   0.24,-135.58) (   0.48,-136.69)  126.18                80
 10/18/2018   10:15:04   (   0.25,-135.56) (  -0.50,-132.15)  388.42                80
 10/19/2018   22:34:20   (  -0.22,-135.49) (  -0.67,-137.46)  225.26                80
 10/20/2018   22:18:16   (  -0.23,-135.47) (   0.36,-132.94)  289.62                80
 10/22/2018   10:37:23   (   0.21,-135.50) (   0.83,-138.20)  309.01                80
 10/23/2018   10:21:19   (   0.22,-135.47) (  -0.21,-133.68)  205.11                80