Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 12 8.  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)
 12/08/2021   18:11:25   (  -0.18,-127.98) (   0.20,-129.78)  204.29                80
 12/09/2021   17:48:06   (  -0.18,-127.95) (  -0.92,-124.79)  361.43                80
 12/11/2021   06:09:44   (   0.17,-127.88) (  -0.18,-129.36)  169.46                80
 12/12/2021   05:46:25   (   0.18,-127.85) (   0.94,-124.37)  396.16                80
 12/13/2021   18:07:56   (  -0.16,-127.83) (   0.09,-128.93)  126.05                80
 12/14/2021   17:44:36   (  -0.17,-127.79) (  -1.03,-123.94)  439.39                80
 12/16/2021   06:06:16   (   0.15,-127.72) (  -0.02,-128.53)   92.08                80
 12/17/2021   05:42:56   (   0.16,-127.68) (   1.11,-123.53)  472.94                80
 12/18/2021   18:04:27   (  -0.15,-127.64) (  -0.03,-128.08)   50.38                80
 12/21/2021   06:02:46   (   0.13,-127.52) (   0.11,-127.68)   18.12                80