Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2018 4 13.  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)
 04/16/2018   06:29:48   (   0.07,-135.29) (   0.18,-134.75)   61.36                80
 04/17/2018   18:45:59   (  -0.08,-135.32) (   0.80,-139.32)  455.53                80
 04/18/2018   18:27:59   (  -0.08,-135.34) (  -0.28,-134.32)  115.64                80
 04/20/2018   06:44:20   (   0.09,-135.37) (  -0.68,-138.93)  405.48                80
 04/21/2018   06:26:19   (   0.09,-135.38) (   0.40,-133.93)  165.21                80
 04/22/2018   18:42:31   (  -0.10,-135.40) (   0.58,-138.50)  353.18                80
 04/23/2018   18:24:30   (  -0.10,-135.41) (  -0.50,-133.50)  217.14                80
 04/25/2018   06:40:50   (   0.10,-135.43) (  -0.51,-138.10)  304.90                80
 04/26/2018   06:22:51   (   0.10,-135.44) (   0.63,-133.11)  265.44                80
 04/27/2018   18:39:01   (  -0.10,-135.45) (   0.41,-137.67)  253.22                80