Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 8 22.  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)
 08/22/2021   06:06:19   (  -0.01,-128.28) (  -0.03,-128.53)   27.93                80
 08/24/2021   18:01:51   (   0.01,-128.23) (  -0.02,-128.09)   16.23                80
 08/26/2021   06:23:31   (  -0.04,-128.32) (  -1.02,-132.68)  497.23                80
 08/27/2021   06:00:12   (  -0.02,-128.32) (   0.14,-127.70)   71.72                80
 08/28/2021   18:21:43   (   0.05,-128.25) (   0.96,-132.24)  454.62                80
 08/29/2021   17:58:24   (   0.03,-128.26) (  -0.21,-127.25)  114.44                80
 08/31/2021   06:20:05   (  -0.07,-128.33) (  -0.84,-131.84)  399.67                80
 09/01/2021   05:56:45   (  -0.04,-128.33) (   0.27,-126.85)  168.54                80
 09/02/2021   18:18:16   (   0.08,-128.25) (   0.77,-131.40)  359.31                80
 09/03/2021   17:54:57   (   0.05,-128.24) (  -0.34,-126.41)  208.96                80