Simultaneous Nadir Overpasses (SNOs) between GOES-15 and TERRA
TLE Epoch: 2017 12 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 12/14/2017   07:49:09   (   0.08,-135.45) (  -0.73,-139.24)  431.56                80
 12/15/2017   19:14:21   (  -0.10,-135.38) (  -1.02,-131.09)  488.39                 8
 12/16/2017   07:36:56   (   0.08,-135.44) (  -0.12,-136.27)   95.13                80
 12/18/2017   07:22:04   (   0.09,-135.43) (   0.56,-133.32)  240.83                80
 12/18/2017   19:45:59   (  -0.07,-135.37) (   0.56,-138.47)  352.23                80
 12/20/2017   19:31:06   (  -0.07,-135.35) (  -0.07,-135.51)   17.10                80
 12/22/2017   19:21:32   (  -0.07,-135.33) (  -0.65,-132.53)  318.16                80
 12/23/2017   07:42:56   (   0.06,-135.39) (  -0.42,-137.73)  265.07                80
 12/25/2017   07:28:02   (   0.06,-135.36) (   0.17,-134.75)   69.27                80
 12/27/2017   07:15:49   (   0.06,-135.33) (   0.83,-131.79)  403.00                80
 12/27/2017   19:39:44   (  -0.05,-135.26) (   0.28,-136.94)  191.30                80