Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2020 12 27.  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)
 12/28/2020   06:06:32   (  -0.19,-128.26) (  -0.45,-129.32)  120.94                80
 12/29/2020   05:48:33   (  -0.21,-128.26) (   0.67,-124.33)  448.07                80
 12/30/2020   18:04:46   (   0.19,-128.25) (   0.35,-128.89)   73.87                80
 12/31/2020   17:46:47   (   0.21,-128.24) (  -0.78,-123.90)  494.61                80
 01/02/2021   06:03:08   (  -0.19,-128.23) (  -0.27,-128.50)   31.58                80
 01/04/2021   18:04:02   (   0.18,-128.20) (   0.16,-128.07)   14.39                80
 01/07/2021   06:02:25   (  -0.17,-128.16) (  -0.07,-127.68)   54.98                80
 01/08/2021   18:18:38   (   0.14,-128.14) (   1.02,-132.25)  467.92                80
 01/09/2021   18:00:39   (   0.16,-128.12) (  -0.05,-127.25)   99.40                80