Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2020 12 23.  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)
 12/23/2020   06:09:55   (  -0.21,-128.26) (  -0.64,-130.14)  213.91                80
 12/24/2020   05:51:56   (  -0.23,-128.27) (   0.48,-125.15)  355.86                80
 12/25/2020   18:08:10   (   0.20,-128.26) (   0.50,-129.72)  165.73                80
 12/26/2020   17:50:10   (   0.22,-128.26) (  -0.57,-124.72)  403.50                80
 12/28/2020   06:06:33   (  -0.19,-128.27) (  -0.41,-129.33)  120.45                80
 12/29/2020   05:48:33   (  -0.21,-128.26) (   0.66,-124.33)  448.60                80
 12/30/2020   18:04:46   (   0.19,-128.25) (   0.31,-128.90)   74.01                80
 12/31/2020   17:46:47   (   0.21,-128.24) (  -0.76,-123.90)  494.51                80
 01/02/2021   06:03:09   (  -0.19,-128.23) (  -0.22,-128.51)   30.99                80
 01/04/2021   18:04:02   (   0.18,-128.20) (   0.17,-128.07)   14.62                80