Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2017 9 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)
 09/13/2017   07:22:34   (   0.27,-135.17) (   0.60,-133.47)  192.45                80
 09/13/2017   19:43:50   (  -0.29,-135.24) (   0.47,-138.64)  387.23                80
 09/15/2017   19:31:39   (  -0.28,-135.28) (  -0.21,-135.69)   46.06                80
 09/17/2017   19:22:07   (  -0.28,-135.32) (  -0.84,-132.73)  294.79                80
 09/18/2017   07:43:31   (   0.29,-135.29) (  -0.26,-137.93)  299.73                80
 09/20/2017   07:28:39   (   0.29,-135.32) (   0.38,-134.97)   40.77                80
 09/22/2017   07:16:27   (   0.28,-135.36) (   1.03,-132.01)  381.01                80
 09/22/2017   19:37:42   (  -0.30,-135.41) (   0.10,-137.17)  200.25                80
 09/24/2017   19:28:10   (  -0.29,-135.44) (  -0.56,-134.21)  139.64                80
 09/25/2017   07:49:34   (   0.30,-135.41) (  -0.52,-139.41)  453.42                80
 09/26/2017   19:15:57   (  -0.29,-135.46) (  -1.17,-131.25)  479.02                80