Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2017 12 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 12/22/2017   19:19:01   (  -0.07,-135.32) (  -0.65,-132.56)  312.99                80
 12/23/2017   07:43:05   (   0.05,-135.38) (  -0.47,-137.75)  270.52                80
 12/25/2017   07:28:14   (   0.05,-135.35) (   0.16,-134.80)   62.29                80
 12/27/2017   07:16:03   (   0.06,-135.31) (   0.78,-131.84)  394.47                80
 12/27/2017   19:39:58   (  -0.04,-135.23) (   0.36,-136.99)  200.28                80
 12/29/2017   19:25:07   (  -0.05,-135.19) (  -0.27,-134.03)  130.98                80
 12/30/2017   07:49:12   (   0.04,-135.24) (  -0.78,-139.23)  452.73                80
 12/31/2017   19:12:56   (  -0.05,-135.13) (  -0.90,-131.07)  461.29                80
 01/01/2018   07:37:00   (   0.04,-135.19) (  -0.21,-136.26)  122.66                80
 01/03/2018   07:22:09   (   0.04,-135.13) (   0.44,-133.31)  206.84                80
 01/03/2018   19:46:04   (  -0.03,-135.04) (   0.71,-138.46)  389.00                80