Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2018 1 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)
 01/14/2018   19:25:06   (  -0.01,-134.66) (  -0.16,-134.00)   75.49                80
 01/16/2018   19:12:54   (  -0.01,-134.57) (  -0.74,-131.03)  401.52                80
 01/17/2018   07:36:59   (   0.00,-134.60) (  -0.32,-136.24)  185.80                80
 01/19/2018   07:22:07   (  -0.00,-134.50) (   0.26,-133.27)  139.70                80
 01/19/2018   19:46:01   (   0.01,-134.42) (   0.87,-138.42)  454.94                80
 01/21/2018   07:09:55   (  -0.01,-134.39) (   0.84,-130.30)  464.72                80
 01/21/2018   19:33:51   (   0.01,-134.32) (   0.23,-135.46)  130.11                80
 01/23/2018   19:18:59   (   0.01,-134.21) (  -0.34,-132.50)  194.10                80
 01/24/2018   07:40:22   (  -0.02,-134.23) (  -0.77,-137.69)  393.76                80
 01/26/2018   07:28:11   (  -0.01,-134.11) (  -0.14,-134.73)   70.72                80