Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2017 9 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 09/22/2017   07:16:28   (   0.28,-135.35) (   1.02,-132.02)  379.09                80
 09/22/2017   19:37:43   (  -0.30,-135.39) (   0.10,-137.17)  202.64                80
 09/24/2017   19:28:11   (  -0.29,-135.42) (  -0.52,-134.21)  136.40                80
 09/25/2017   07:49:36   (   0.30,-135.39) (  -0.52,-139.42)  456.74                80
 09/26/2017   19:15:59   (  -0.29,-135.44) (  -1.15,-131.25)  474.84                80
 09/27/2017   07:37:23   (   0.30,-135.41) (   0.05,-136.45)  118.65                80
 09/29/2017   07:22:31   (   0.29,-135.42) (   0.68,-133.49)  218.88                80
 09/29/2017   19:43:47   (  -0.30,-135.44) (   0.38,-138.65)  364.93                80
 10/01/2017   19:31:35   (  -0.29,-135.45) (  -0.25,-135.70)   27.94                80
 10/03/2017   19:22:03   (  -0.29,-135.45) (  -0.90,-132.74)  308.52                80
 10/04/2017   07:43:26   (   0.29,-135.43) (  -0.26,-137.92)  283.66                80