Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2017 12 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)
 12/20/2017   19:31:12   (  -0.07,-135.34) (  -0.05,-135.53)   20.66                80
 12/22/2017   19:19:01   (  -0.07,-135.32) (  -0.67,-132.57)  313.05                80
 12/23/2017   07:43:05   (   0.05,-135.38) (  -0.45,-137.76)  270.43                80
 12/25/2017   07:28:14   (   0.06,-135.35) (   0.17,-134.80)   62.39                80
 12/27/2017   07:16:03   (   0.06,-135.31) (   0.79,-131.84)  394.60                80
 12/27/2017   19:39:58   (  -0.04,-135.23) (   0.35,-136.99)  200.13                80
 12/29/2017   19:25:07   (  -0.05,-135.19) (  -0.27,-134.03)  131.13                80
 12/30/2017   07:49:12   (   0.04,-135.25) (  -0.78,-139.23)  452.57                80
 12/31/2017   19:12:56   (  -0.05,-135.14) (  -0.90,-131.07)  461.46                80
 01/01/2018   07:37:00   (   0.04,-135.19) (  -0.21,-136.26)  122.50                80