Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 6 19.  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)
 06/20/2021   06:09:32   (   0.11,-128.41) (  -0.09,-129.42)  114.54                80
 06/21/2021   05:46:13   (   0.11,-128.40) (   0.99,-124.42)  452.86                80
 06/22/2021   18:05:05   (  -0.11,-128.39) (   0.03,-128.98)   68.13                80
 06/23/2021   17:47:07   (  -0.11,-128.37) (  -1.11,-124.00)  499.48                80
 06/25/2021   06:06:07   (   0.11,-128.34) (   0.05,-128.58)   27.47                80
 06/27/2021   18:04:21   (  -0.12,-128.29) (  -0.17,-128.15)   16.36                80
 06/30/2021   06:00:03   (   0.13,-128.26) (   0.26,-127.76)   57.32                80
 07/01/2021   18:18:55   (  -0.13,-128.21) (   0.77,-132.31)  466.90                80
 07/02/2021   18:00:56   (  -0.13,-128.20) (  -0.31,-127.31)  100.31                80