Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2018 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)
 12/22/2018   18:50:55   (  -0.11,-128.59) (  -0.90,-124.91)  418.08                80
 12/23/2018   07:12:19   (   0.10,-128.63) (  -0.22,-130.10)  167.18                80
 12/25/2018   06:57:28   (   0.10,-128.61) (   0.43,-127.14)  166.93                80
 12/25/2018   19:18:43   (  -0.08,-128.55) (   0.71,-132.29)  425.61                80
 12/27/2018   19:06:31   (  -0.08,-128.53) (   0.12,-129.33)   91.54                80
 12/29/2018   18:57:00   (  -0.08,-128.51) (  -0.53,-126.37)  242.46                80
 12/30/2018   07:18:24   (   0.06,-128.56) (  -0.58,-131.56)  341.28                80
 01/01/2019   07:06:13   (   0.07,-128.54) (   0.07,-128.61)    8.29                80
 01/03/2019   06:51:21   (   0.07,-128.50) (   0.67,-125.65)  324.88                80
 01/03/2019   19:12:36   (  -0.06,-128.43) (   0.46,-130.79)  269.54                80