Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 10 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/14/2018   22:28:07   (  -0.26,-135.56) (  -0.31,-135.94)   43.46                80
 10/15/2018   22:12:01   (  -0.27,-135.55) (   0.66,-131.41)  471.82                80
 10/17/2018   10:31:09   (   0.24,-135.57) (   0.48,-136.69)  127.10                80
 10/18/2018   10:15:04   (   0.25,-135.55) (  -0.50,-132.15)  387.29                80
 10/19/2018   22:34:20   (  -0.22,-135.47) (  -0.67,-137.46)  226.98                80
 10/20/2018   22:18:15   (  -0.23,-135.45) (   0.31,-132.92)  287.69                80
 10/22/2018   10:37:23   (   0.21,-135.48) (   0.82,-138.20)  310.97                80
 10/23/2018   10:21:18   (   0.22,-135.45) (  -0.15,-133.67)  202.93                80
 10/24/2018   22:40:34   (  -0.19,-135.35) (  -1.01,-138.98)  413.37                80
 10/25/2018   22:24:28   (  -0.21,-135.33) (  -0.03,-134.44)  100.55                80
 10/27/2018   10:43:37   (   0.18,-135.35) (   1.16,-139.72)  498.61                80
 10/28/2018   10:24:51   (   0.20,-135.31) (   0.18,-135.18)   14.26                80