Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2017 12 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 12/22/2017   19:19:01   (  -0.07,-135.32) (  -0.64,-132.56)  313.04                80
 12/23/2017   07:43:06   (   0.05,-135.38) (  -0.42,-137.76)  270.48                80
 12/25/2017   07:28:15   (   0.05,-135.35) (   0.20,-134.80)   62.41                80
 12/27/2017   07:16:04   (   0.06,-135.31) (   0.82,-131.85)  394.55                80
 12/27/2017   19:39:59   (  -0.04,-135.23) (   0.32,-136.99)  200.18                80
 12/29/2017   19:25:08   (  -0.05,-135.19) (  -0.30,-134.04)  131.04                80
 12/30/2017   07:49:11   (   0.04,-135.25) (  -0.81,-139.23)  452.65                80
 12/31/2017   19:12:57   (  -0.05,-135.13) (  -0.93,-131.08)  461.37                80
 01/01/2018   07:37:00   (   0.04,-135.19) (  -0.18,-136.27)  122.60                80
 01/03/2018   07:22:10   (   0.04,-135.13) (   0.46,-133.31)  206.90                80
 01/03/2018   19:46:04   (  -0.03,-135.04) (   0.69,-138.46)  388.97                80