Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2018 12 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)
 12/10/2018   06:00:58   (   0.18,-128.59) (   0.18,-128.56)    3.26                80
 12/12/2018   18:01:53   (  -0.17,-128.60) (  -0.29,-128.13)   53.38                80
 12/14/2018   06:20:54   (   0.15,-128.62) (  -0.78,-132.72)  467.47                80
 12/15/2018   05:57:36   (   0.16,-128.62) (   0.34,-127.73)  101.24                80
 12/16/2018   18:16:29   (  -0.15,-128.60) (   0.65,-132.29)  419.86                80
 12/17/2018   17:58:31   (  -0.15,-128.61) (  -0.46,-127.30)  149.53                80
 12/19/2018   06:17:32   (   0.14,-128.63) (  -0.61,-131.88)  371.42                80
 12/20/2018   05:54:14   (   0.15,-128.62) (   0.51,-126.89)  196.52                80
 12/21/2018   18:13:07   (  -0.14,-128.58) (   0.48,-131.46)  326.82                80
 12/22/2018   17:55:09   (  -0.14,-128.58) (  -0.64,-126.46)  241.61                80