Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2017 9 12.  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   07:22:35   (   0.27,-135.17) (   0.65,-133.49)  192.43                80
 09/13/2017   19:43:51   (  -0.29,-135.24) (   0.42,-138.65)  387.36                80
 09/15/2017   19:31:39   (  -0.28,-135.28) (  -0.17,-135.69)   46.39                80
 09/17/2017   19:22:08   (  -0.28,-135.32) (  -0.82,-132.73)  294.22                80
 09/18/2017   07:43:32   (   0.29,-135.29) (  -0.29,-137.93)  300.29                80
 09/20/2017   07:28:41   (   0.29,-135.32) (   0.36,-134.97)   39.83                80
 09/22/2017   07:16:30   (   0.28,-135.36) (   1.01,-132.02)  379.65                80
 09/22/2017   19:37:46   (  -0.30,-135.41) (   0.07,-137.19)  201.82                80
 09/24/2017   19:28:14   (  -0.29,-135.44) (  -0.52,-134.22)  137.56                80
 09/25/2017   07:49:39   (   0.30,-135.41) (  -0.53,-139.43)  455.55                80