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)
 12/25/2018   05:50:51   (   0.13,-128.59) (   0.68,-126.06)  288.40                80
 12/26/2018   18:09:44   (  -0.11,-128.56) (   0.36,-130.61)  233.80                80
 12/27/2018   17:51:45   (  -0.12,-128.56) (  -0.75,-125.62)  334.55                80
 12/29/2018   06:10:47   (   0.10,-128.56) (  -0.25,-130.22)  188.39                80
 12/30/2018   05:47:29   (   0.11,-128.55) (   0.86,-125.23)  378.82                80
 12/31/2018   18:06:21   (  -0.10,-128.51) (   0.17,-129.78)  144.72                80
 01/01/2019   17:48:23   (  -0.10,-128.50) (  -0.94,-124.79)  423.23                80
 01/03/2019   06:07:24   (   0.09,-128.51) (  -0.12,-129.38)   99.54                80
 01/04/2019   05:44:06   (   0.10,-128.49) (   1.00,-124.39)  467.18                80
 01/05/2019   18:02:58   (  -0.08,-128.43) (   0.04,-128.94)   58.08                80