Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 8 14.  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)
 08/14/2021   18:11:23   (  -0.03,-128.14) (   0.34,-129.76)  185.56                80
 08/15/2021   17:48:05   (  -0.05,-128.15) (  -0.82,-124.78)  384.91                80
 08/17/2021   06:09:45   (   0.02,-128.24) (  -0.21,-129.37)  128.18                80
 08/18/2021   05:46:25   (   0.04,-128.25) (   0.88,-124.37)  441.17                80
 08/19/2021   18:07:57   (  -0.01,-128.19) (   0.17,-128.93)   84.24                80
 08/20/2021   17:44:38   (  -0.03,-128.20) (  -0.99,-123.94)  485.47                80
 08/22/2021   06:06:19   (   0.00,-128.29) (  -0.05,-128.53)   27.76                80
 08/24/2021   18:04:30   (   0.00,-128.23) (  -0.00,-128.09)   15.74                80
 08/26/2021   06:23:31   (  -0.03,-128.32) (  -1.03,-132.68)  496.88                80
 08/27/2021   06:00:12   (  -0.01,-128.33) (   0.13,-127.69)   72.15                80