Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2018 9 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 09/23/2018   07:29:25   (   0.32,-135.52) (   0.42,-135.13)   45.19                80
 09/25/2018   07:17:12   (   0.32,-135.55) (   1.01,-132.16)  384.74                80
 09/25/2018   19:38:28   (  -0.33,-135.60) (   0.04,-137.33)  196.56                80
 09/27/2018   19:28:56   (  -0.33,-135.62) (  -0.61,-134.37)  142.37                80
 09/28/2018   07:50:19   (   0.34,-135.59) (  -0.50,-139.57)  451.36                80
 09/29/2018   19:16:43   (  -0.33,-135.64) (  -1.20,-131.41)  480.52                80
 09/30/2018   07:38:07   (   0.34,-135.61) (   0.15,-136.61)  113.70                80
 10/02/2018   07:23:14   (   0.33,-135.61) (   0.75,-133.64)  223.11                80
 10/02/2018   19:44:30   (  -0.34,-135.63) (   0.31,-138.81)  360.42                80
 10/04/2018   19:32:17   (  -0.33,-135.63) (  -0.28,-135.84)   24.28                80