Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 6 1.  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)
 06/01/2021   05:59:49   (   0.07,-128.42) (   0.20,-127.74)   77.35                80
 06/02/2021   18:18:42   (  -0.07,-128.47) (   0.81,-132.30)  437.69                80
 06/03/2021   18:00:43   (  -0.07,-128.48) (  -0.33,-127.31)  132.71                80
 06/05/2021   06:19:45   (   0.08,-128.47) (  -0.71,-131.91)  392.64                80
 06/06/2021   05:56:26   (   0.08,-128.47) (   0.43,-126.92)  176.78                80
 06/07/2021   18:15:18   (  -0.08,-128.50) (   0.58,-131.48)  339.58                80
 06/08/2021   17:57:19   (  -0.08,-128.51) (  -0.50,-126.48)  230.24                80
 06/10/2021   06:16:21   (   0.08,-128.49) (  -0.47,-131.09)  295.50                80
 06/11/2021   05:53:02   (   0.08,-128.49) (   0.61,-126.09)  273.04                80
 06/12/2021   18:11:54   (  -0.09,-128.50) (   0.40,-130.65)  245.44                80
 06/13/2021   17:53:56   (  -0.09,-128.50) (  -0.74,-125.66)  323.48                80