Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 6 18.  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)
 06/18/2021   17:50:31   (  -0.11,-128.44) (  -0.90,-124.82)  411.52                80
 06/20/2021   06:09:32   (   0.11,-128.41) (  -0.11,-129.42)  114.54                80
 06/21/2021   05:46:13   (   0.11,-128.40) (   0.97,-124.42)  452.76                80
 06/22/2021   18:05:05   (  -0.11,-128.38) (   0.04,-128.98)   68.81                80
 06/23/2021   17:47:07   (  -0.11,-128.37) (  -1.10,-123.99)  498.73                80
 06/25/2021   06:06:07   (   0.11,-128.34) (   0.04,-128.58)   28.09                80
 06/27/2021   18:04:21   (  -0.12,-128.28) (  -0.16,-128.15)   15.14                80
 06/30/2021   06:00:03   (   0.13,-128.25) (   0.25,-127.75)   56.29                80
 07/01/2021   18:18:55   (  -0.13,-128.20) (   0.78,-132.31)  468.43                80