Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2018 5 10.  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)
 05/10/2018   06:30:23   (   0.14,-135.45) (   0.08,-135.61)   19.23                80
 05/12/2018   18:28:34   (  -0.14,-135.44) (  -0.19,-135.18)   29.78                80
 05/14/2018   06:47:33   (   0.14,-135.40) (  -0.86,-139.77)  499.03                80
 05/15/2018   06:29:34   (   0.14,-135.38) (   0.28,-134.78)   68.37                80
 05/16/2018   18:48:24   (  -0.15,-135.38) (   0.76,-139.34)  452.05                80
 05/17/2018   18:25:05   (  -0.15,-135.35) (  -0.38,-134.35)  114.55                80
 05/19/2018   06:44:04   (   0.15,-135.29) (  -0.66,-138.94)  416.04                80
 05/20/2018   06:26:03   (   0.16,-135.27) (   0.43,-133.94)  150.31                80
 05/21/2018   18:44:55   (  -0.16,-135.25) (   0.56,-138.51)  371.25                80
 05/22/2018   18:21:34   (  -0.16,-135.23) (  -0.52,-133.51)  194.79                80