Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2017 12 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 12/13/2017   19:27:46   (  -0.10,-135.39) (  -0.38,-134.05)  152.09                80
 12/14/2017   07:49:09   (   0.08,-135.45) (  -0.71,-139.25)  430.97                80
 12/15/2017   19:15:34   (  -0.10,-135.40) (  -1.02,-131.09)  489.13                80
 12/16/2017   07:36:58   (   0.08,-135.45) (  -0.07,-136.29)   94.22                80
 12/18/2017   07:22:05   (   0.09,-135.45) (   0.51,-133.32)  241.94                80
 12/18/2017   19:46:00   (  -0.07,-135.38) (   0.56,-138.48)  351.21                80
 12/20/2017   19:33:47   (  -0.07,-135.37) (  -0.02,-135.51)   15.89                80
 12/22/2017   19:21:35   (  -0.07,-135.36) (  -0.66,-132.55)  319.34                80
 12/23/2017   07:42:59   (   0.06,-135.42) (  -0.43,-137.74)  263.71                80
 12/25/2017   07:28:07   (   0.06,-135.40) (   0.22,-134.78)   70.58                80