Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 6 24.  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)
 06/25/2021   06:06:07   (   0.11,-128.34) (   0.03,-128.58)   27.72                80
 06/27/2021   18:04:21   (  -0.12,-128.30) (  -0.16,-128.15)   16.96                80
 06/30/2021   06:00:03   (   0.13,-128.25) (   0.25,-127.75)   57.38                80
 07/01/2021   18:18:55   (  -0.13,-128.22) (   0.78,-132.31)  466.02                80
 07/02/2021   18:00:55   (  -0.13,-128.20) (  -0.31,-127.31)  101.24                80
 07/04/2021   06:19:56   (   0.12,-128.18) (  -0.74,-131.90)  424.29                80
 07/05/2021   05:56:37   (   0.13,-128.16) (   0.41,-126.91)  141.83                80
 07/06/2021   18:15:29   (  -0.12,-128.11) (   0.62,-131.47)  383.25                80
 07/07/2021   17:57:30   (  -0.13,-128.09) (  -0.47,-126.47)  183.23                80