Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2018 12 25.  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)
 12/26/2018   18:09:44   (  -0.11,-128.56) (   0.33,-130.62)  233.76                80
 12/27/2018   17:51:46   (  -0.12,-128.56) (  -0.79,-125.63)  334.59                80
 12/29/2018   06:10:47   (   0.10,-128.56) (  -0.28,-130.21)  188.43                80
 12/30/2018   05:47:28   (   0.11,-128.55) (   0.84,-125.22)  378.79                80
 12/31/2018   18:06:21   (  -0.10,-128.51) (   0.20,-129.78)  144.65                80
 01/01/2019   17:48:22   (  -0.10,-128.50) (  -0.92,-124.78)  423.29                80
 01/03/2019   06:07:25   (   0.09,-128.51) (  -0.09,-129.39)   99.59                80
 01/04/2019   05:44:06   (   0.10,-128.49) (   1.03,-124.39)  467.13                80
 01/05/2019   18:02:58   (  -0.08,-128.43) (   0.01,-128.95)   58.06                80
 01/08/2019   06:04:01   (   0.07,-128.43) (   0.05,-128.54)   13.27                80