Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2017 12 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  METOP-B Lat/Lon    Distance(km)  Time Diff(sec)
 12/26/2017   06:24:04   (   0.08,-135.32) (   0.40,-133.87)  165.21                80
 12/27/2017   18:42:56   (  -0.07,-135.24) (   0.62,-138.43)  363.09                80
 12/28/2017   18:24:56   (  -0.07,-135.22) (  -0.48,-133.44)  203.82                80
 12/30/2017   06:43:56   (   0.06,-135.24) (  -0.58,-138.03)  317.49                80
 12/31/2017   06:20:37   (   0.07,-135.22) (   0.53,-133.03)  248.48                80
 01/01/2018   18:39:28   (  -0.06,-135.12) (   0.50,-137.59)  281.89                80
 01/02/2018   18:21:29   (  -0.06,-135.09) (  -0.60,-132.59)  284.06                80
 01/04/2018   06:40:29   (   0.05,-135.10) (  -0.44,-137.19)  238.08                80
 01/05/2018   06:17:11   (   0.05,-135.07) (   0.72,-132.20)  327.39                80
 01/06/2018   18:36:01   (  -0.04,-134.96) (   0.37,-136.75)  204.01                80
 01/07/2018   18:18:01   (  -0.05,-134.93) (  -0.74,-131.75)  361.65                80