Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2018 12 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 12/23/2018   07:12:20   (   0.10,-128.63) (  -0.19,-130.10)  167.36                80
 12/25/2018   06:57:29   (   0.10,-128.61) (   0.44,-127.15)  166.89                80
 12/25/2018   19:18:43   (  -0.08,-128.55) (   0.70,-132.30)  425.21                80
 12/27/2018   19:06:33   (  -0.08,-128.54) (   0.07,-129.34)   91.07                80
 12/29/2018   18:57:02   (  -0.08,-128.52) (  -0.55,-126.38)  242.92                80
 12/30/2018   07:18:25   (   0.06,-128.57) (  -0.56,-131.57)  341.28                80
 01/01/2019   07:06:14   (   0.07,-128.54) (   0.06,-128.62)    8.07                80
 01/03/2019   06:51:23   (   0.07,-128.51) (   0.69,-125.66)  324.76                80
 01/03/2019   19:12:38   (  -0.06,-128.44) (   0.46,-130.81)  269.24                80
 01/05/2019   19:03:07   (  -0.06,-128.41) (  -0.16,-127.85)   63.21                80