Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2017 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)
 12/18/2017   07:22:07   (   0.08,-135.43) (   0.50,-133.32)  238.94                80
 12/18/2017   19:46:03   (  -0.07,-135.36) (   0.59,-138.48)  354.65                80
 12/20/2017   19:33:53   (  -0.07,-135.34) (  -0.03,-135.53)   20.92                80
 12/22/2017   19:19:03   (  -0.07,-135.32) (  -0.63,-132.57)  312.11                80
 12/23/2017   07:43:08   (   0.06,-135.38) (  -0.45,-137.77)  271.56                80
 12/25/2017   07:28:19   (   0.06,-135.35) (   0.17,-134.82)   60.44                80
 12/27/2017   07:16:10   (   0.06,-135.31) (   0.76,-131.86)  391.61                80
 12/27/2017   19:40:06   (  -0.04,-135.23) (   0.36,-137.02)  203.45                80
 12/29/2017   19:25:18   (  -0.05,-135.19) (  -0.26,-134.07)  126.50                80
 12/30/2017   07:49:23   (   0.04,-135.25) (  -0.85,-139.27)  457.61                80
 12/31/2017   19:13:11   (  -0.05,-135.14) (  -0.91,-131.14)  455.23                80