Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 5 23.  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)
 05/23/2021   05:45:58   (   0.03,-128.30) (   0.90,-124.40)  444.37                80
 05/24/2021   18:04:50   (  -0.03,-128.36) (   0.11,-128.96)   67.97                80
 05/27/2021   06:05:53   (   0.04,-128.37) (  -0.02,-128.56)   22.32                80
 05/29/2021   18:04:07   (  -0.05,-128.43) (  -0.11,-128.14)   33.12                80
 05/31/2021   06:23:09   (   0.06,-128.43) (  -0.88,-132.74)  491.43                80
 06/01/2021   05:59:50   (   0.06,-128.43) (   0.20,-127.74)   78.38                80
 06/02/2021   18:18:42   (  -0.06,-128.47) (   0.81,-132.30)  437.69                80
 06/03/2021   18:00:43   (  -0.06,-128.48) (  -0.32,-127.31)  132.94                80
 06/05/2021   06:19:45   (   0.07,-128.48) (  -0.71,-131.91)  390.74                80