Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2018 12 21.  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)
 12/21/2018   18:13:07   (  -0.14,-128.60) (   0.49,-131.46)  324.72                80
 12/22/2018   17:55:08   (  -0.14,-128.60) (  -0.63,-126.46)  244.02                80
 12/24/2018   06:14:10   (   0.12,-128.61) (  -0.44,-131.05)  278.96                80
 12/25/2018   05:50:51   (   0.13,-128.59) (   0.67,-126.06)  288.43                80
 12/26/2018   18:09:43   (  -0.11,-128.56) (   0.36,-130.61)  234.44                80
 12/27/2018   17:51:45   (  -0.12,-128.55) (  -0.75,-125.62)  333.82                80
 12/29/2018   06:10:47   (   0.10,-128.56) (  -0.26,-130.22)  188.73                80
 12/30/2018   05:47:29   (   0.11,-128.54) (   0.86,-125.23)  378.37                80
 12/31/2018   18:06:21   (  -0.10,-128.50) (   0.17,-129.78)  145.86                80
 01/01/2019   17:48:23   (  -0.10,-128.49) (  -0.94,-124.79)  422.00                80
 01/03/2019   06:07:24   (   0.09,-128.50) (  -0.12,-129.38)  100.34                80
 01/04/2019   05:44:06   (   0.10,-128.48) (   1.00,-124.38)  466.27                80