Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2017 12 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)
 12/16/2017   06:33:37   (   0.11,-135.44) (   0.09,-135.54)   12.53                80
 12/18/2017   18:31:49   (  -0.11,-135.38) (  -0.15,-135.10)   30.62                80
 12/20/2017   06:50:51   (   0.09,-135.42) (  -0.85,-139.71)  488.64                80
 12/21/2017   06:27:31   (   0.10,-135.41) (   0.25,-134.71)   79.08                80
 12/22/2017   18:46:22   (  -0.08,-135.34) (   0.78,-139.27)  447.77                80
 12/23/2017   18:28:23   (  -0.09,-135.33) (  -0.32,-134.27)  120.11                80
 12/25/2017   06:47:24   (   0.07,-135.36) (  -0.68,-138.87)  399.70                80
 12/26/2017   06:24:05   (   0.08,-135.34) (   0.42,-133.88)  167.38                80
 12/27/2017   18:42:56   (  -0.07,-135.26) (   0.61,-138.43)  361.07                80