Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2018 7 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)
 07/12/2018   07:38:25   (   0.04,-135.42) (  -0.19,-136.58)  131.95                80
 07/14/2018   07:23:34   (   0.06,-135.44) (   0.46,-133.63)  206.51                80
 07/14/2018   19:47:29   (  -0.02,-135.48) (   0.67,-138.78)  375.58                80
 07/16/2018   19:35:18   (  -0.03,-135.50) (   0.02,-135.83)   37.52                80
 07/18/2018   19:20:26   (  -0.05,-135.52) (  -0.58,-132.87)  300.45                80
 07/19/2018   07:44:29   (   0.01,-135.49) (  -0.52,-138.06)  291.62                80
 07/21/2018   07:29:38   (   0.02,-135.51) (   0.09,-135.10)   45.97                80
 07/23/2018   07:17:27   (   0.02,-135.51) (   0.76,-132.15)  383.03                80
 07/23/2018   19:41:21   (   0.01,-135.55) (   0.38,-137.30)  199.28                80
 07/25/2018   19:26:29   (   0.00,-135.55) (  -0.24,-134.34)  136.97                80