Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2017 9 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 09/20/2017   07:28:39   (   0.29,-135.32) (   0.33,-134.96)   39.65                80
 09/22/2017   07:16:28   (   0.28,-135.35) (   1.00,-132.02)  379.05                80
 09/22/2017   19:37:44   (  -0.30,-135.39) (   0.07,-137.18)  202.58                80
 09/24/2017   19:28:12   (  -0.29,-135.42) (  -0.54,-134.22)  136.45                80
 09/25/2017   07:49:36   (   0.30,-135.40) (  -0.56,-139.41)  456.71                80
 09/26/2017   19:16:00   (  -0.29,-135.44) (  -1.15,-131.26)  474.92                80
 09/27/2017   07:37:24   (   0.30,-135.41) (   0.05,-136.45)  118.65                80
 09/29/2017   07:22:33   (   0.29,-135.42) (   0.72,-133.50)  218.83                80
 09/29/2017   19:43:49   (  -0.30,-135.45) (   0.36,-138.66)  364.94                80
 10/01/2017   19:31:37   (  -0.29,-135.45) (  -0.25,-135.70)   28.01                80