Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2017 12 22.  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)
 12/23/2017   18:28:22   (  -0.09,-135.31) (  -0.29,-134.26)  118.38                80
 12/25/2017   06:47:24   (   0.07,-135.34) (  -0.71,-138.87)  401.61                80
 12/26/2017   06:24:04   (   0.08,-135.32) (   0.39,-133.87)  165.28                80
 12/27/2017   18:42:55   (  -0.07,-135.24) (   0.64,-138.43)  363.54                80
 12/28/2017   18:24:56   (  -0.07,-135.22) (  -0.47,-133.43)  203.27                80
 12/30/2017   06:43:56   (   0.06,-135.24) (  -0.59,-138.02)  317.81                80
 12/31/2017   06:20:38   (   0.07,-135.21) (   0.58,-133.04)  248.09                80
 01/01/2018   18:39:28   (  -0.06,-135.11) (   0.51,-137.59)  282.77                80
 01/02/2018   18:21:29   (  -0.06,-135.08) (  -0.59,-132.59)  283.11                80
 01/04/2018   06:40:30   (   0.05,-135.10) (  -0.39,-137.20)  238.82                80
 01/05/2018   06:17:10   (   0.05,-135.06) (   0.72,-132.20)  326.57                80