Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2018 12 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 12/20/2018   19:03:07   (  -0.11,-128.59) (  -0.28,-127.87)   82.52                80
 12/22/2018   18:50:56   (  -0.11,-128.58) (  -0.91,-124.91)  417.49                80
 12/23/2018   07:12:20   (   0.10,-128.63) (  -0.21,-130.10)  167.63                80
 12/25/2018   06:57:29   (   0.10,-128.61) (   0.42,-127.15)  166.25                80
 12/25/2018   19:18:43   (  -0.08,-128.54) (   0.72,-132.30)  426.56                80
 12/27/2018   06:45:18   (   0.09,-128.58) (   1.05,-124.19)  499.94                80
 12/27/2018   19:06:32   (  -0.08,-128.52) (   0.09,-129.34)   92.70                80
 12/29/2018   18:57:02   (  -0.08,-128.50) (  -0.55,-126.38)  240.98                80
 12/30/2018   07:18:25   (   0.06,-128.56) (  -0.57,-131.57)  342.62                80
 01/01/2019   07:06:14   (   0.07,-128.53) (   0.06,-128.62)    9.74                80