Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2018 12 20.  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   18:13:06   (  -0.14,-128.60) (   0.52,-131.45)  324.88                80
 12/22/2018   17:55:08   (  -0.14,-128.60) (  -0.60,-126.46)  243.82                80
 12/24/2018   06:14:10   (   0.12,-128.61) (  -0.41,-131.06)  279.01                80
 12/25/2018   05:50:52   (   0.13,-128.59) (   0.70,-126.06)  288.31                80
 12/26/2018   18:09:44   (  -0.11,-128.55) (   0.34,-130.62)  234.87                80
 12/27/2018   17:51:46   (  -0.12,-128.55) (  -0.78,-125.63)  333.33                80
 12/29/2018   06:10:47   (   0.10,-128.56) (  -0.29,-130.21)  189.07                80
 12/30/2018   05:47:28   (   0.11,-128.54) (   0.83,-125.22)  378.00                80
 12/31/2018   18:06:21   (  -0.10,-128.49) (   0.21,-129.77)  146.58                80
 01/01/2019   17:48:22   (  -0.10,-128.48) (  -0.91,-124.78)  421.25                80
 01/03/2019   06:07:24   (   0.09,-128.49) (  -0.09,-129.38)  100.94                80