Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2018 6 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 06/21/2018   07:17:25   (   0.14,-134.85) (   0.69,-132.12)  309.53                80
 06/21/2018   19:41:21   (  -0.11,-134.88) (   0.38,-137.28)  273.28                80
 06/23/2018   19:26:30   (  -0.12,-134.96) (  -0.24,-134.33)   71.54                80
 06/25/2018   19:14:20   (  -0.13,-135.04) (  -0.93,-131.39)  415.84                80
 06/26/2018   07:38:23   (   0.10,-135.05) (  -0.25,-136.56)  172.64                80
 06/28/2018   07:23:33   (   0.11,-135.12) (   0.45,-133.62)  170.90                80
 06/28/2018   19:47:28   (  -0.08,-135.15) (   0.69,-138.77)  412.21                80
 06/30/2018   19:35:17   (  -0.09,-135.21) (   0.05,-135.82)   69.39                80
 07/02/2018   19:20:27   (  -0.11,-135.27) (  -0.64,-132.88)  273.00                80
 07/03/2018   07:44:29   (   0.08,-135.28) (  -0.53,-138.06)  315.89                80