Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 10 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/12/2018   10:27:35   (   0.27,-135.64) (   0.15,-135.17)   53.88                80
 10/14/2018   22:28:06   (  -0.26,-135.57) (  -0.34,-135.94)   42.43                80
 10/15/2018   22:12:00   (  -0.27,-135.56) (   0.64,-131.40)  473.13                80
 10/17/2018   10:31:09   (   0.24,-135.59) (   0.50,-136.69)  125.26                80
 10/18/2018   10:15:04   (   0.25,-135.57) (  -0.54,-132.16)  389.48                80
 10/19/2018   22:34:19   (  -0.22,-135.50) (  -0.68,-137.46)  224.30                80
 10/20/2018   22:18:15   (  -0.23,-135.48) (   0.35,-132.94)  290.74                80
 10/22/2018   10:37:22   (   0.21,-135.51) (   0.84,-138.20)  307.36                80
 10/23/2018   10:21:18   (   0.22,-135.49) (  -0.20,-133.68)  206.89                80
 10/24/2018   22:40:33   (  -0.20,-135.39) (  -1.01,-138.98)  408.93                80