Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2017 12 6.  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)
 12/07/2017   06:17:11   (   0.15,-135.40) (   0.89,-132.22)  362.59                80
 12/08/2017   18:36:02   (  -0.14,-135.38) (   0.15,-136.78)  159.13                80
 12/09/2017   18:18:03   (  -0.14,-135.39) (  -0.95,-131.78)  411.01                80
 12/11/2017   06:37:04   (   0.13,-135.44) (  -0.06,-136.38)  107.27                80
 12/12/2017   06:13:44   (   0.13,-135.44) (   1.03,-131.38)  462.01                80
 12/13/2017   18:32:36   (  -0.12,-135.41) (  -0.00,-135.94)   60.77                80
 12/16/2017   06:33:38   (   0.12,-135.46) (   0.09,-135.55)    9.75                80
 12/18/2017   18:31:49   (  -0.11,-135.41) (  -0.16,-135.11)   34.48                80
 12/20/2017   06:50:51   (   0.09,-135.46) (  -0.84,-139.71)  483.95                80