Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2018 12 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 12/13/2018   18:57:00   (  -0.14,-128.59) (  -0.59,-126.39)  249.54                80
 12/14/2018   07:18:24   (   0.12,-128.63) (  -0.53,-131.58)  335.29                80
 12/16/2018   07:03:34   (   0.12,-128.64) (   0.13,-128.63)    1.15                80
 12/18/2018   06:51:24   (   0.12,-128.64) (   0.78,-125.68)  336.81                80
 12/18/2018   19:12:39   (  -0.11,-128.59) (   0.37,-130.83)  254.99                80
 12/20/2018   19:03:09   (  -0.11,-128.58) (  -0.27,-127.88)   79.96                80
 12/22/2018   18:50:59   (  -0.11,-128.56) (  -0.90,-124.93)  414.00                80
 12/23/2018   07:12:23   (   0.10,-128.62) (  -0.23,-130.11)  170.20                80
 12/25/2018   06:57:33   (   0.10,-128.59) (   0.39,-127.16)  162.66                80
 12/25/2018   19:18:49   (  -0.08,-128.52) (   0.71,-132.32)  431.56                80