Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 1 1.  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)
 01/02/2021   06:03:09   (  -0.19,-128.23) (  -0.26,-128.50)   31.24                80
 01/04/2021   18:04:02   (   0.18,-128.21) (   0.15,-128.07)   15.71                80
 01/07/2021   06:02:25   (  -0.17,-128.17) (  -0.06,-127.68)   56.03                80
 01/08/2021   18:18:37   (   0.14,-128.16) (   1.07,-132.24)  465.97                80
 01/09/2021   18:00:39   (   0.16,-128.14) (  -0.06,-127.26)  101.51                80
 01/11/2021   06:17:00   (  -0.12,-128.10) (  -0.99,-131.85)  427.90                80
 01/12/2021   05:59:02   (  -0.15,-128.08) (   0.15,-126.86)  139.56                80
 01/13/2021   18:15:14   (   0.12,-128.06) (   0.86,-131.43)  383.09                80
 01/14/2021   17:57:15   (   0.14,-128.04) (  -0.22,-126.43)  184.09                80