Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2017 12 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 12/30/2017   07:49:12   (   0.03,-135.25) (  -0.79,-139.23)  452.24                80
 12/31/2017   19:15:36   (  -0.05,-135.15) (  -0.89,-131.07)  463.31                80
 01/01/2018   07:37:00   (   0.03,-135.20) (  -0.22,-136.26)  121.65                80
 01/03/2018   07:22:09   (   0.04,-135.14) (   0.42,-133.31)  208.45                80
 01/03/2018   19:46:04   (  -0.02,-135.07) (   0.72,-138.46)  386.21                80
 01/05/2018   19:31:13   (  -0.02,-135.01) (   0.08,-135.50)   56.32                80
 01/07/2018   19:21:41   (  -0.02,-134.95) (  -0.51,-132.54)  273.43                80
 01/08/2018   07:43:04   (   0.01,-135.00) (  -0.59,-137.73)  311.24                80
 01/10/2018   07:28:14   (   0.02,-134.93) (   0.07,-134.78)   18.09                80
 01/12/2018   07:16:02   (   0.02,-134.86) (   0.67,-131.81)  346.70                80
 01/12/2018   19:39:56   (  -0.01,-134.78) (   0.47,-136.96)  248.82                80