Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2018 12 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 12/27/2018   19:06:31   (  -0.08,-128.54) (   0.12,-129.33)   90.25                80
 12/29/2018   18:57:00   (  -0.08,-128.52) (  -0.53,-126.38)  244.00                80
 12/30/2018   07:18:24   (   0.06,-128.57) (  -0.58,-131.56)  340.69                80
 01/01/2019   07:06:13   (   0.06,-128.55) (   0.07,-128.61)    7.33                80
 01/03/2019   06:51:21   (   0.07,-128.52) (   0.66,-125.65)  325.99                80
 01/03/2019   19:12:36   (  -0.06,-128.45) (   0.47,-130.80)  267.33                80
 01/05/2019   19:03:05   (  -0.06,-128.42) (  -0.19,-127.85)   65.53                80
 01/07/2019   18:50:53   (  -0.05,-128.38) (  -0.80,-124.88)  398.07                80
 01/08/2019   07:12:17   (   0.04,-128.44) (  -0.31,-130.07)  185.72                80