Simultaneous Nadir Overpasses (SNOs) between GOES-17 and METOP-B
TLE Epoch: 2021 9 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  METOP-B Lat/Lon    Distance(km)  Time Diff(sec)
 09/20/2021   18:43:42   (  -0.04,-137.20) (   0.27,-138.49)  146.65                80
 09/21/2021   18:25:42   (  -0.04,-137.21) (  -0.84,-133.49)  422.86                80
 09/23/2021   06:44:44   (   0.04,-137.21) (  -0.15,-138.09)  101.02                80
 09/24/2021   06:21:24   (   0.03,-137.20) (   0.96,-133.10)  468.06                80
 09/25/2021   18:40:15   (  -0.03,-137.20) (   0.05,-137.66)   51.73                80
 09/28/2021   06:41:16   (   0.03,-137.18) (   0.02,-137.25)    8.17                80
 09/30/2021   18:39:28   (  -0.02,-137.15) (  -0.12,-136.82)   38.84                80
 10/02/2021   06:58:28   (   0.02,-137.13) (  -0.92,-141.41)  487.14                80
 10/03/2021   06:35:09   (   0.02,-137.12) (   0.20,-136.42)   80.49                80