Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2018 12 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 12/18/2018   06:51:23   (   0.12,-128.64) (   0.79,-125.68)  337.26                80
 12/18/2018   19:12:38   (  -0.11,-128.59) (   0.35,-130.83)  253.63                80
 12/20/2018   19:03:07   (  -0.11,-128.59) (  -0.29,-127.87)   82.03                80
 12/22/2018   18:50:55   (  -0.11,-128.58) (  -0.87,-124.91)  416.81                80
 12/23/2018   07:12:20   (   0.10,-128.62) (  -0.19,-130.11)  167.94                80
 12/25/2018   06:57:28   (   0.10,-128.60) (   0.39,-127.14)  165.83                80
 12/25/2018   19:18:42   (  -0.08,-128.53) (   0.74,-132.29)  427.44                80
 12/27/2018   06:45:17   (   0.09,-128.58) (   1.04,-124.19)  499.40                80
 12/27/2018   19:06:31   (  -0.08,-128.51) (   0.09,-129.34)   93.69                80
 12/29/2018   18:56:59   (  -0.08,-128.49) (  -0.50,-126.37)  239.91                80
 12/30/2018   07:18:24   (   0.06,-128.55) (  -0.55,-131.57)  343.33                80