Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 6 25.  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) (   0.07,-128.59)   27.74                80
 06/27/2021   18:04:20   (  -0.12,-128.30) (  -0.14,-128.15)   17.05                80
 06/30/2021   06:00:02   (   0.13,-128.25) (   0.22,-127.75)   57.13                80
 07/01/2021   18:18:54   (  -0.13,-128.22) (   0.80,-132.31)  466.20                80
 07/02/2021   18:00:56   (  -0.13,-128.20) (  -0.34,-127.32)  101.02                80
 07/04/2021   06:19:56   (   0.12,-128.18) (  -0.70,-131.91)  424.70                80
 07/05/2021   05:56:37   (   0.13,-128.15) (   0.39,-126.91)  141.40                80
 07/06/2021   18:15:29   (  -0.12,-128.10) (   0.64,-131.47)  383.60                80
 07/07/2021   17:57:31   (  -0.13,-128.08) (  -0.50,-126.48)  182.84                80