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   07:28:40   (   0.29,-135.32) (   0.36,-134.97)   39.47                80
 09/22/2017   07:16:28   (   0.28,-135.35) (   0.97,-132.01)  379.08                80
 09/22/2017   19:37:43   (  -0.30,-135.40) (   0.10,-137.17)  202.47                80
 09/24/2017   19:28:13   (  -0.29,-135.42) (  -0.57,-134.23)  136.72                80
 09/25/2017   07:49:36   (   0.30,-135.40) (  -0.53,-139.42)  456.52                80
 09/26/2017   19:16:01   (  -0.29,-135.44) (  -1.19,-131.27)  475.28                80
 09/27/2017   07:37:24   (   0.30,-135.42) (   0.09,-136.46)  118.28                80
 09/29/2017   07:22:32   (   0.29,-135.43) (   0.71,-133.50)  219.30                80
 09/29/2017   19:43:48   (  -0.30,-135.45) (   0.36,-138.66)  364.34                80
 10/01/2017   19:31:36   (  -0.29,-135.46) (  -0.25,-135.70)   27.27                80