Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2018 12 4.  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)
 12/05/2018   06:07:00   (   0.20,-128.54) (   0.00,-129.39)   97.96                80
 12/06/2018   05:43:42   (   0.21,-128.54) (   1.11,-124.40)  471.88                80
 12/07/2018   18:02:35   (  -0.19,-128.57) (  -0.11,-128.96)   44.31                80
 12/10/2018   06:00:59   (   0.18,-128.60) (   0.21,-128.57)    4.98                80
 12/12/2018   18:01:53   (  -0.17,-128.62) (  -0.27,-128.13)   55.94                80
 12/14/2018   06:20:55   (   0.16,-128.65) (  -0.74,-132.73)  464.43                80
 12/15/2018   05:57:37   (   0.16,-128.65) (   0.37,-127.73)  104.57                80
 12/16/2018   18:16:29   (  -0.15,-128.64) (   0.68,-132.29)  415.85                80
 12/17/2018   17:58:31   (  -0.15,-128.65) (  -0.44,-127.29)  153.95                80