Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2018 4 21.  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)
 04/21/2018   06:26:20   (   0.09,-135.39) (   0.44,-133.94)  166.61                80
 04/22/2018   18:42:30   (  -0.10,-135.41) (   0.59,-138.49)  351.66                80
 04/23/2018   18:24:31   (  -0.10,-135.42) (  -0.54,-133.50)  218.92                80
 04/25/2018   06:40:51   (   0.10,-135.45) (  -0.47,-138.11)  302.48                80
 04/26/2018   06:22:51   (   0.10,-135.46) (   0.61,-133.10)  268.11                80
 04/27/2018   18:39:02   (  -0.11,-135.47) (   0.36,-137.67)  250.44                80
 04/28/2018   18:21:02   (  -0.10,-135.48) (  -0.71,-132.67)  319.87                80
 04/30/2018   06:37:22   (   0.11,-135.50) (  -0.29,-137.27)  202.18                80
 05/01/2018   06:19:22   (   0.11,-135.51) (   0.84,-132.28)  367.82                80
 05/02/2018   18:35:33   (  -0.12,-135.51) (   0.19,-136.84)  151.69                80
 05/03/2018   18:17:33   (  -0.12,-135.52) (  -0.95,-131.85)  417.79                80