Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2018 4 9.  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) (  -0.04,-135.57)   48.09                80
 04/13/2018   18:31:28   (  -0.07,-135.22) (  -0.11,-135.15)    9.04                80
 04/16/2018   06:29:48   (   0.07,-135.29) (   0.17,-134.75)   60.66                80
 04/17/2018   18:45:59   (  -0.08,-135.31) (   0.81,-139.32)  456.16                80
 04/18/2018   18:27:59   (  -0.07,-135.33) (  -0.32,-134.33)  114.91                80
 04/20/2018   06:44:20   (   0.09,-135.36) (  -0.69,-138.93)  406.62                80
 04/21/2018   06:26:19   (   0.09,-135.37) (   0.38,-133.93)  163.97                80
 04/22/2018   18:42:30   (  -0.10,-135.38) (   0.59,-138.50)  354.37                80
 04/23/2018   18:24:31   (  -0.09,-135.39) (  -0.54,-133.51)  215.84                80