Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2017 8 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 08/21/2017   07:19:06   (   0.18,-135.00) (   0.82,-131.96)  344.81                80
 08/21/2017   19:37:43   (  -0.21,-135.09) (   0.20,-137.14)  232.16                80
 08/23/2017   19:28:12   (  -0.21,-135.11) (  -0.42,-134.18)  105.65                80
 08/24/2017   07:46:55   (   0.23,-135.03) (  -0.69,-139.37)  493.85                80
 08/25/2017   19:16:01   (  -0.20,-135.12) (  -1.06,-131.23)  443.27                80
 08/26/2017   07:34:45   (   0.23,-135.04) (  -0.06,-136.42)  156.47                80
 08/28/2017   07:25:14   (   0.22,-135.05) (   0.58,-133.47)  180.47                80
 08/28/2017   19:43:49   (  -0.25,-135.13) (   0.50,-138.63)  398.08                80
 08/30/2017   19:31:38   (  -0.24,-135.13) (  -0.15,-135.68)   61.74                80
 09/01/2017   19:22:07   (  -0.23,-135.12) (  -0.73,-132.71)  273.95                80
 09/02/2017   07:43:30   (   0.26,-135.05) (  -0.37,-137.90)  324.76                80