Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 12 3.  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)
 12/03/2021   18:14:54   (  -0.21,-128.14) (   0.36,-130.62)  283.34                80
 12/04/2021   17:51:34   (  -0.21,-128.11) (  -0.76,-125.63)  282.73                80
 12/06/2021   06:13:13   (   0.19,-128.04) (  -0.28,-130.22)  247.88                80
 12/07/2021   05:49:54   (   0.20,-128.01) (   0.84,-125.22)  317.85                80
 12/08/2021   18:11:25   (  -0.18,-127.99) (   0.20,-129.78)  204.13                80
 12/09/2021   17:48:06   (  -0.19,-127.96) (  -0.92,-124.79)  361.65                80
 12/11/2021   06:09:44   (   0.17,-127.89) (  -0.18,-129.36)  169.10                80
 12/12/2021   05:46:25   (   0.18,-127.85) (   0.94,-124.37)  396.60                80
 12/13/2021   18:07:56   (  -0.16,-127.83) (   0.09,-128.93)  125.50                80
 12/14/2021   17:44:36   (  -0.17,-127.80) (  -1.03,-123.94)  440.02                80
 12/16/2021   06:06:16   (   0.16,-127.72) (  -0.01,-128.53)   91.28                80