Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 1 2.  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) (  -0.23,-128.51)   31.24                80
 01/04/2021   18:01:22   (   0.18,-128.21) (   0.18,-128.07)   16.26                80
 01/07/2021   06:02:26   (  -0.17,-128.18) (  -0.03,-127.69)   56.41                80
 01/08/2021   18:18:38   (   0.14,-128.17) (   1.04,-132.25)  465.49                80
 01/09/2021   18:00:39   (   0.16,-128.15) (  -0.03,-127.25)  102.02                80
 01/11/2021   06:17:01   (  -0.12,-128.11) (  -0.95,-131.86)  427.39                80
 01/12/2021   05:59:01   (  -0.15,-128.09) (   0.12,-126.86)  140.09                80
 01/13/2021   18:15:14   (   0.12,-128.07) (   0.88,-131.42)  382.35                80
 01/14/2021   17:57:14   (   0.14,-128.05) (  -0.19,-126.42)  184.91                80