Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2018 4 10.  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)
 04/11/2018   06:30:36   (   0.06,-135.15) (  -0.03,-135.58)   47.98                80
 04/13/2018   18:28:47   (  -0.06,-135.22) (  -0.07,-135.14)    8.67                80
 04/16/2018   06:29:48   (   0.07,-135.29) (   0.18,-134.75)   60.76                80
 04/17/2018   18:45:59   (  -0.08,-135.31) (   0.79,-139.32)  456.05                80
 04/18/2018   18:27:59   (  -0.07,-135.33) (  -0.28,-134.32)  115.02                80
 04/20/2018   06:44:19   (   0.09,-135.36) (  -0.73,-138.92)  406.43                80
 04/21/2018   06:26:19   (   0.09,-135.37) (   0.40,-133.93)  164.16                80
 04/22/2018   18:42:31   (  -0.10,-135.39) (   0.57,-138.50)  354.19                80
 04/23/2018   18:24:30   (  -0.09,-135.40) (  -0.50,-133.50)  216.04                80