Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2018 12 22.  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)
 12/24/2018   06:14:10   (   0.12,-128.61) (  -0.43,-131.05)  278.95                80
 12/25/2018   05:50:51   (   0.13,-128.59) (   0.69,-126.06)  288.46                80
 12/26/2018   18:09:44   (  -0.11,-128.56) (   0.35,-130.61)  234.12                80
 12/27/2018   17:51:45   (  -0.12,-128.56) (  -0.77,-125.62)  334.17                80
 12/29/2018   06:10:48   (   0.10,-128.56) (  -0.24,-130.22)  188.54                80
 12/30/2018   05:47:29   (   0.11,-128.55) (   0.87,-125.23)  378.63                80
 12/31/2018   18:06:21   (  -0.10,-128.50) (   0.16,-129.78)  145.35                80
 01/01/2019   17:48:23   (  -0.10,-128.49) (  -0.96,-124.79)  422.57                80
 01/03/2019   06:07:24   (   0.09,-128.50) (  -0.11,-129.38)   99.91                80
 01/04/2019   05:44:06   (   0.10,-128.48) (   1.01,-124.39)  466.72                80